Several large refactorings

* Refactor location of all data files to include a subdirectory
  for the mod version
* Update the BaseModel class to allow models to load themselves from
  any text file (whether JSON or CG)
* Refactor ModPack & ModVersion to move the laoding functionality in
  one into the other (and use the new stuff in BaseModel)
* Move the parser versions into a new subdirectory which allows for
  future additional parsers

src/scripts/models/mod.coffee

@@ -0,0 +1,28 @@
+###
+Crafting Guide - mod.coffee
+
+Copyright (c) 2015 by Redwood Labs
+All rights reserved.
+###
+
+BaseModel = require './base_model'
+
+########################################################################################################################
+
+module.exports = class Mod extends BaseModel
+
+    constructor: (attributes={}, options={})->
+        if not attributes.name? then throw new Error 'attributes.name is required'
+        attributes.id = attributes.slug = _.slugify attributes.name
+        super attributes, options
+
+    # Backbone.View Overrides ######################################################################
+
+    parse: (response)->
+
+    sync: (method, model, options={})->
+        if method isnt 'read' then throw new Error "Mod data can only be read, not #{method}d"
+        super method, model, options
+
+    url: ->
+        return "/data/#{@slug}/mod.cg"