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/inventory.test.coffee

@@ -135,9 +135,9 @@ describe 'Inventory', ->
             expect(-> inventory.remove('wool', 10)).to.throw Error,
                 'cannot remove 10: only 4 wool in this inventory'
 
-        it 'removes a single item by default', ->
+        it 'removes all items by default', ->
             inventory.remove 'wool'
-            inventory._stacks.wool.quantity.should.equal 3
+            expect(inventory._stacks.wool).to.be.empty
 
         it 'removes a quantity above 1', ->
             inventory.remove 'wool', 3