Refactor ModVersion into Mod and ModVersion

* Remove V1 of the mod version parser and shift V2 up to be V1
* Add a parser for mod.cg files, and refactor the the mod-version.cg
  files to push the appropriate content up to the mod.cg
* Remove the concept of "silent" from BaseModel along with logging
  each event as they are fired (which is what really prompted the
  need for it in the first place)
* Move use of the Storage class to be completely the province of the
  controllers most closely related to models affected
* Convert the ModVersionController to the ModController and have it
  take on responsibility for choosing the mod version
* Update BaseModel to support simple accessors for the current state
* Update CraftingPlan to be able to remove uncraftable items
* Implement the Mod model

src/scripts/models/versioned_parser_base.coffee

@@ -0,0 +1,50 @@
+###
+Crafting Guide - versioned_parser_base.coffee
+
+Copyright (c) 2015 by Redwood Labs
+All rights reserved.
+###
+
+########################################################################################################################
+
+module.exports = class VersionedParserBase
+
+    constructor: (options={})->
+        @_parsers       = @_createParsers options
+        @_currentSchema = _.chain(@_parsers).keys().last().value()
+
+    # Class Members ################################################################################
+
+    @SCHEMA = /schema: *([0-9]+)/
+
+    # Public Methods ###############################################################################
+
+    parse: (text)->
+        return unless text?
+
+        schema = @_identifySchema text
+        parser = @_parsers[schema]
+        if not parser? then throw new Error "schema version #{schema} is not supported"
+
+        parser.parse text
+
+        return @_model
+
+    unparse: (schema=null)->
+        schema ?= @_currentSchema
+        if not modVersion? then throw new Error 'modVersion is required'
+
+        parser = @_parsers["#{schema}"]
+        if not parser? then throw new Error "version #{schema} is not supported"
+
+        return parser.unparse()
+
+    # Overridable Methods ##########################################################################
+
+    _createParsers: (options)->
+        throw new Error 'subclasses must override this method'
+
+    _identifySchema: (text)->
+        match = VersionedParserBase.SCHEMA.exec text
+        if not match? then throw new Error 'missing "schema" declaration'
+        return match[1]