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

test/test.coffee

@@ -31,10 +31,10 @@ mocha.setup 'bdd'
 require './crafting_plan.test'
 require './inventory.test'
 require './inventory_parser.test'
+require './mod.test'
 require './mod_pack.test'
 require './mod_version.test'
 require './parser_versions/mod_version_parser_v1.test'
-require './parser_versions/mod_version_parser_v2.test'
 require './string_builder.test'
 
 mocha.checkLeaks()