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/base_model.coffee

@@ -5,22 +5,69 @@ Copyright (c) 2014-2015 by Redwood Labs
 All rights reserved.
 ###
 
+{Event}      = require '../constants'
+{ModelState} = require '../constants'
+
 ########################################################################################################################
 
 module.exports = class BaseModel extends Backbone.Model
 
     constructor: (attributes={}, options={})->
+        options.allowedSyncMethods = []
         super attributes, options
 
         makeGetter = (name)-> return -> @get name
         makeSetter = (name)-> return (value)-> @set name, value
-        for name in _.keys attributes
+        for name, value of attributes
             continue if name is 'id'
             Object.defineProperty this, name, get:makeGetter(name), set:makeSetter(name)
 
+        @allowedSyncMethods = options.allowedSyncMethods
+
+        @state = ModelState.unloaded
+        @on 'request', => @state = ModelState.loading
+        @on 'sync',    => @state = ModelState.loaded
+        @on 'error',   => @state = ModelState.error
+
+        @loading = null
+
+    # Public Methods ###############################################################################
+
+    # Event Methods ################################################################################
+
+    onLoadSucceeded: (text, status, xhr)->
+        try
+            @set @parse text
+            @trigger Event.sync, this, text
+        catch e
+            logger.error "A parsing error occured: #{e.stack}"
+            @onLoadFailed e.message, 'parsing failed', xhr
+
+    onLoadFailed: (error, status, xhr)->
+        logger.error "#{@constructor.name} (#{@cid}) failed to load: status:#{status}, message:#{error}"
+        @trigger Event.error, this, error
+
     # Backbone.Model Overrides #####################################################################
 
-    sync: -> # do nothing
+    fetch: ->
+        url = @url()
+        logger.info "#{@constructor.name} (#{@cid}) reading from url: #{url}"
+
+        @trigger Event.request, this
+        @loading = w.promise (resolve, reject)=>
+            $.ajax
+                url:      url
+                dataType: 'text'
+                success:  (text, status, xhr)=> resolve @onLoadSucceeded text, status, xhr
+                error:    (xhr, status, error)=> reject @onLoadFailed error, status, xhr
+
+        return @loading
+
+    parse: (text)->
+        return JSON.parse text
+
+    sync: (method, model)->
+        throw new Error "#{@constructor.name} (#{@cid}) is not permitted to #{method}"
 
     trigger: (name)->
         logger.trace "#{@constructor.name}.#{@cid} triggered a \"#{name}\" event"