app init maven io.trygvis.appsh.examples:foo:1.0-SNAPSHOT =>

  # find resolver
  app config set app.resolver maven
  # run resolver/maven
    # resolve version for artifact
    # download artifact
    app config set maven.id io.trygvis.appsh.examples:foo:1.0-SNAPSHOT
  # run scripts/
  # create symlink

app init [-d directory] <resolver> <resolver args>

resolver/maven -r <repository url> <artifact id>

app list - lists all applications available under the specified directory


TODO:
* tab => spaces
* camelCase => snake_case
* Figure out the versions of bash that's available in the different
  major operating systems:
  * Debian
  * Ubuntu
  * RedHat
  * SLES/OpenSuse
  * Cygwin
* Document patterns for parsing command line arguments
* Support sending in config to an app when running init. Has to be
  installed before running the hooks, useful to controlling
  environment through config.