Qualify all item slugs to the mod which adds them #53

* Change default item URL to fall under /mod/<mod slug>/<item slug>
  but kept the old URL pattern around with the old behavior (i.e.,
  find the first item with that slug)
* Update Item to have a `qualifiedSlug` property which combines the
  item's own slug with its Mod's slug.  Updated a lot of code all
  over to use this in preference to the plain slug.
* Add a `localizeTo` method to Inventory to allow non-qualified slugs
  to be converted into qualified slugs within the inventory's stacks
* Update ModPack to work with either qualified or unqualified slugs
  for relevant methods
* Fix model state changes to happen before related events are
  triggered
* Add a debounce to the CraftingPlan object when triggering a recraft
  due to changes in related objects (esp. its inventories)
* Update the Inventory's sort to keep items sorted by mod before name
  with the Minecraft items sorted to the top
* Fix `ModPack.findItemByName` to actually recursively use the Mod's
  method instead of slugifying the given name and looking for the
  slug (since this won't necessarily work anymore).
* Ensure each Mod is assigned a reference to its containing ModPack
* Fix NameFinder to only consider an item non-gatherable if it is
  also craftable
* Update ModVersionParserV1 to assign qualified slugs to recipes
  for any items which are in the same mod (leaving any other slugs
  unqualified)
* Add Underscore mixins for composing and decomposing slugs
* Update old tests for the use of qualified slugs, and some new tests
  for the new methods added

test/inventory.test.coffee

@@ -12,7 +12,7 @@ Item          = require '../src/scripts/models/item'
 
 ########################################################################################################################
 
-inventory = null
+inventory = modPack = null
 
 ########################################################################################################################
 
@@ -107,6 +107,39 @@ describe 'inventory.coffee', ->
             inventory.hasAtLeast('wool', 4).should.be.true
             inventory.hasAtLeast('wool', 5).should.be.false
 
+    describe 'localizeTo', ->
+
+        before ->
+            modPack =
+                map:
+                    wool:       'minecraft__wool'
+                    string:     'minecraft__string'
+                    boat:       'minecraft__boat'
+                    stone_gear: 'buildcraft__stone_gear'
+                findItem: (slug)->
+                    [modSlug, itemSlug] = _.decomposeSlug slug
+                    return slug:itemSlug, qualifiedSlug:@map[itemSlug]
+
+        it 'replaces item slugs with qualified slugs', ->
+            inventory.add 'stone_gear'
+            inventory.localizeTo modPack
+            inventory.toList().should.eql [
+                'minecraft__boat',
+                [20, 'minecraft__string'],
+                [4, 'minecraft__wool'],
+                'buildcraft__stone_gear'
+            ]
+
+        it 'ignores qualified slugs', ->
+            inventory.add 'buildcraft__stone_gear'
+            inventory.localizeTo modPack
+            inventory.toList().should.eql [
+                'minecraft__boat',
+                [20, 'minecraft__string'],
+                [4, 'minecraft__wool'],
+                'buildcraft__stone_gear'
+            ]
+
     describe 'pop', ->
 
         it 'returns null for an empty inventory', ->