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diff --git a/src/main/resources/webapp/external/spin-1.2.7/spin.js b/src/main/resources/webapp/external/spin-1.2.7/spin.js
new file mode 100644
index 0000000..64ccfa7
--- /dev/null
+++ b/src/main/resources/webapp/external/spin-1.2.7/spin.js
@@ -0,0 +1,320 @@
+//fgnass.github.com/spin.js#v1.2.7
+!function(window, document, undefined) {
+
+  /**
+   * Copyright (c) 2011 Felix Gnass [fgnass at neteye dot de]
+   * Licensed under the MIT license
+   */
+
+  var prefixes = ['webkit', 'Moz', 'ms', 'O'] /* Vendor prefixes */
+      , animations = {} /* Animation rules keyed by their name */
+      , useCssAnimations
+
+  /**
+   * Utility function to create elements. If no tag name is given,
+   * a DIV is created. Optionally properties can be passed.
+   */
+  function createEl(tag, prop) {
+    var el = document.createElement(tag || 'div')
+        , n
+
+    for(n in prop) el[n] = prop[n]
+    return el
+  }
+
+  /**
+   * Appends children and returns the parent.
+   */
+  function ins(parent /* child1, child2, ...*/) {
+    for (var i=1, n=arguments.length; i<n; i++)
+      parent.appendChild(arguments[i])
+
+    return parent
+  }
+
+  /**
+   * Insert a new stylesheet to hold the @keyframe or VML rules.
+   */
+  var sheet = function() {
+    var el = createEl('style', {type : 'text/css'})
+    ins(document.getElementsByTagName('head')[0], el)
+    return el.sheet || el.styleSheet
+  }()
+
+  /**
+   * Creates an opacity keyframe animation rule and returns its name.
+   * Since most mobile Webkits have timing issues with animation-delay,
+   * we create separate rules for each line/segment.
+   */
+  function addAnimation(alpha, trail, i, lines) {
+    var name = ['opacity', trail, ~~(alpha*100), i, lines].join('-')
+        , start = 0.01 + i/lines*100
+        , z = Math.max(1 - (1-alpha) / trail * (100-start), alpha)
+        , prefix = useCssAnimations.substring(0, useCssAnimations.indexOf('Animation')).toLowerCase()
+        , pre = prefix && '-'+prefix+'-' || ''
+
+    if (!animations[name]) {
+      sheet.insertRule(
+          '@' + pre + 'keyframes ' + name + '{' +
+              '0%{opacity:' + z + '}' +
+              start + '%{opacity:' + alpha + '}' +
+              (start+0.01) + '%{opacity:1}' +
+              (start+trail) % 100 + '%{opacity:' + alpha + '}' +
+              '100%{opacity:' + z + '}' +
+              '}', sheet.cssRules.length)
+
+      animations[name] = 1
+    }
+    return name
+  }
+
+  /**
+   * Tries various vendor prefixes and returns the first supported property.
+   **/
+  function vendor(el, prop) {
+    var s = el.style
+        , pp
+        , i
+
+    if(s[prop] !== undefined) return prop
+    prop = prop.charAt(0).toUpperCase() + prop.slice(1)
+    for(i=0; i<prefixes.length; i++) {
+      pp = prefixes[i]+prop
+      if(s[pp] !== undefined) return pp
+    }
+  }
+
+  /**
+   * Sets multiple style properties at once.
+   */
+  function css(el, prop) {
+    for (var n in prop)
+      el.style[vendor(el, n)||n] = prop[n]
+
+    return el
+  }
+
+  /**
+   * Fills in default values.
+   */
+  function merge(obj) {
+    for (var i=1; i < arguments.length; i++) {
+      var def = arguments[i]
+      for (var n in def)
+        if (obj[n] === undefined) obj[n] = def[n]
+    }
+    return obj
+  }
+
+  /**
+   * Returns the absolute page-offset of the given element.
+   */
+  function pos(el) {
+    var o = { x:el.offsetLeft, y:el.offsetTop }
+    while((el = el.offsetParent))
+      o.x+=el.offsetLeft, o.y+=el.offsetTop
+
+    return o
+  }
+
+  var defaults = {
+    lines: 12,            // The number of lines to draw
+    length: 7,            // The length of each line
+    width: 5,             // The line thickness
+    radius: 10,           // The radius of the inner circle
+    rotate: 0,            // Rotation offset
+    corners: 1,           // Roundness (0..1)
+    color: '#000',        // #rgb or #rrggbb
+    speed: 1,             // Rounds per second
+    trail: 100,           // Afterglow percentage
+    opacity: 1/4,         // Opacity of the lines
+    fps: 20,              // Frames per second when using setTimeout()
+    zIndex: 2e9,          // Use a high z-index by default
+    className: 'spinner', // CSS class to assign to the element
+    top: 'auto',          // center vertically
+    left: 'auto',         // center horizontally
+    position: 'relative'  // element position
+  }
+
+  /** The constructor */
+  var Spinner = function Spinner(o) {
+    if (!this.spin) return new Spinner(o)
+    this.opts = merge(o || {}, Spinner.defaults, defaults)
+  }
+
+  Spinner.defaults = {}
+
+  merge(Spinner.prototype, {
+    spin: function(target) {
+      this.stop()
+      var self = this
+          , o = self.opts
+          , el = self.el = css(createEl(0, {className: o.className}), {position: o.position, width: 0, zIndex: o.zIndex})
+          , mid = o.radius+o.length+o.width
+          , ep // element position
+          , tp // target position
+
+      if (target) {
+        target.insertBefore(el, target.firstChild||null)
+        tp = pos(target)
+        ep = pos(el)
+        css(el, {
+          left: (o.left == 'auto' ? tp.x-ep.x + (target.offsetWidth >> 1) : parseInt(o.left, 10) + mid) + 'px',
+          top: (o.top == 'auto' ? tp.y-ep.y + (target.offsetHeight >> 1) : parseInt(o.top, 10) + mid)  + 'px'
+        })
+      }
+
+      el.setAttribute('aria-role', 'progressbar')
+      self.lines(el, self.opts)
+
+      if (!useCssAnimations) {
+        // No CSS animation support, use setTimeout() instead
+        var i = 0
+            , fps = o.fps
+            , f = fps/o.speed
+            , ostep = (1-o.opacity) / (f*o.trail / 100)
+            , astep = f/o.lines
+
+            ;(function anim() {
+          i++;
+          for (var s=o.lines; s; s--) {
+            var alpha = Math.max(1-(i+s*astep)%f * ostep, o.opacity)
+            self.opacity(el, o.lines-s, alpha, o)
+          }
+          self.timeout = self.el && setTimeout(anim, ~~(1000/fps))
+        })()
+      }
+      return self
+    },
+
+    stop: function() {
+      var el = this.el
+      if (el) {
+        clearTimeout(this.timeout)
+        if (el.parentNode) el.parentNode.removeChild(el)
+        this.el = undefined
+      }
+      return this
+    },
+
+    lines: function(el, o) {
+      var i = 0
+          , seg
+
+      function fill(color, shadow) {
+        return css(createEl(), {
+          position: 'absolute',
+          width: (o.length+o.width) + 'px',
+          height: o.width + 'px',
+          background: color,
+          boxShadow: shadow,
+          transformOrigin: 'left',
+          transform: 'rotate(' + ~~(360/o.lines*i+o.rotate) + 'deg) translate(' + o.radius+'px' +',0)',
+          borderRadius: (o.corners * o.width>>1) + 'px'
+        })
+      }
+
+      for (; i < o.lines; i++) {
+        seg = css(createEl(), {
+          position: 'absolute',
+          top: 1+~(o.width/2) + 'px',
+          transform: o.hwaccel ? 'translate3d(0,0,0)' : '',
+          opacity: o.opacity,
+          animation: useCssAnimations && addAnimation(o.opacity, o.trail, i, o.lines) + ' ' + 1/o.speed + 's linear infinite'
+        })
+
+        if (o.shadow) ins(seg, css(fill('#000', '0 0 4px ' + '#000'), {top: 2+'px'}))
+
+        ins(el, ins(seg, fill(o.color, '0 0 1px rgba(0,0,0,.1)')))
+      }
+      return el
+    },
+
+    opacity: function(el, i, val) {
+      if (i < el.childNodes.length) el.childNodes[i].style.opacity = val
+    }
+
+  })
+
+    /////////////////////////////////////////////////////////////////////////
+    // VML rendering for IE
+    /////////////////////////////////////////////////////////////////////////
+
+  /**
+   * Check and init VML support
+   */
+  ;(function() {
+
+    function vml(tag, attr) {
+      return createEl('<' + tag + ' xmlns="urn:schemas-microsoft.com:vml" class="spin-vml">', attr)
+    }
+
+    var s = css(createEl('group'), {behavior: 'url(#default#VML)'})
+
+    if (!vendor(s, 'transform') && s.adj) {
+
+      // VML support detected. Insert CSS rule ...
+      sheet.addRule('.spin-vml', 'behavior:url(#default#VML)')
+
+      Spinner.prototype.lines = function(el, o) {
+        var r = o.length+o.width
+            , s = 2*r
+
+        function grp() {
+          return css(
+              vml('group', {
+                coordsize: s + ' ' + s,
+                coordorigin: -r + ' ' + -r
+              }),
+              { width: s, height: s }
+          )
+        }
+
+        var margin = -(o.width+o.length)*2 + 'px'
+            , g = css(grp(), {position: 'absolute', top: margin, left: margin})
+            , i
+
+        function seg(i, dx, filter) {
+          ins(g,
+              ins(css(grp(), {rotation: 360 / o.lines * i + 'deg', left: ~~dx}),
+                  ins(css(vml('roundrect', {arcsize: o.corners}), {
+                    width: r,
+                    height: o.width,
+                    left: o.radius,
+                    top: -o.width>>1,
+                    filter: filter
+                  }),
+                      vml('fill', {color: o.color, opacity: o.opacity}),
+                      vml('stroke', {opacity: 0}) // transparent stroke to fix color bleeding upon opacity change
+                  )
+              )
+          )
+        }
+
+        if (o.shadow)
+          for (i = 1; i <= o.lines; i++)
+            seg(i, -2, 'progid:DXImageTransform.Microsoft.Blur(pixelradius=2,makeshadow=1,shadowopacity=.3)')
+
+        for (i = 1; i <= o.lines; i++) seg(i)
+        return ins(el, g)
+      }
+
+      Spinner.prototype.opacity = function(el, i, val, o) {
+        var c = el.firstChild
+        o = o.shadow && o.lines || 0
+        if (c && i+o < c.childNodes.length) {
+          c = c.childNodes[i+o]; c = c && c.firstChild; c = c && c.firstChild
+          if (c) c.opacity = val
+        }
+      }
+    }
+    else
+      useCssAnimations = vendor(s, 'animation')
+  })()
+
+  if (typeof define == 'function' && define.amd)
+    define(function() { return Spinner })
+  else
+    window.Spinner = Spinner
+
+}(window, document);