Added files that are built with Grunt.  Also helper module function to
access marionette.modal.coffee
changed method to class method.
A different way of defining the module constant
forgot to change the method being used.
Added functionality to the gem for the purposes of embedding it in the
rails gem.
Added clean task to grunt file to remove generated files before build.
Also ran grunt build task and added npm package dependency.
Changed Marionette.Modal class name so they can both be included in the
bundle with no issues.
Nested files in asset module namespaces for ease of access in rubyland.
Also bumped gem version.
Added spec js directory to the clean task.  Also added the newest versions
of backbone, marionette and underscore libs.
Version bump and build.
renamed things to use dash ruby gem naming convention
Changed Marionette.Modal render function to take advantage of Marionette.Renderer