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/mod_pack.test.coffee

@@ -19,22 +19,23 @@ buildcraft = industrialCraft = minecraft = modPack = null
 describe 'mod_pack.coffee', ->
 
     beforeEach ->
-        minecraft = new Mod slug:'minecraft'
+        minecraft = new Mod slug:'minecraft', name:'Minecraft'
         minecraft.addModVersion new ModVersion modSlug:minecraft.slug, version:'1.7.10'
         minecraft.activeModVersion.addItem new Item name:'Wool'
         minecraft.activeModVersion.addItem new Item name:'Bed', recipes:['']
         minecraft.activeModVersion.registerSlug 'iron_chestplate', 'Iron Chestplate'
 
-        buildcraft = new Mod slug:'buildcraft'
+        buildcraft = new Mod slug:'buildcraft', name:'Buildcraft'
         buildcraft.addModVersion new ModVersion modSlug:buildcraft.slug, version:'6.2.6'
         buildcraft.activeModVersion.addItem new Item name:'Stone Gear', recipes:['']
-        buildcraft.activeModVersion.addItem new Item name:'Bed', recipes:['']
+        buildcraft.activeModVersion.addItem new Item name:'Wrench', recipes:['']
         buildcraft.activeVersion = Mod.Version.None
 
-        industrialCraft = new Mod slug:'industrial_craft'
+        industrialCraft = new Mod slug:'industrial_craft', name:'Industrial Craft'
         industrialCraft.addModVersion new ModVersion modSlug:industrialCraft.slug, version:'2.0'
         industrialCraft.activeModVersion.addItem new Item name:'Resin'
         industrialCraft.activeModVersion.addItem new Item name:'Rubber'
+        industrialCraft.activeModVersion.addItem new Item name:'Wrench', recipes:['']
         industrialCraft.activeVersion = Mod.Version.None
 
         modPack = new ModPack
@@ -42,6 +43,30 @@ describe 'mod_pack.coffee', ->
         modPack.addMod buildcraft
         modPack.addMod industrialCraft
 
+    describe 'findItem', ->
+
+        it 'can find an item by partial slug', ->
+            item = modPack.findItem 'wool'
+            item.qualifiedSlug.should.equal 'minecraft__wool'
+
+        it 'can find an item by full slug', ->
+            item = modPack.findItem 'minecraft__wool'
+            item.name.should.equal 'Wool'
+
+        it 'can find an ambiguous item by full slug', ->
+            buildcraft.activeVersion = Mod.Version.Latest
+            industrialCraft.activeVersion = Mod.Version.Latest
+            item = modPack.findItem 'industrial_craft__wrench'
+            item.name.should.equal 'Wrench'
+            item.modVersion.mod.name.should.equal 'Industrial Craft'
+
+        it 'can find an ambiguous item by partial slug', ->
+            buildcraft.activeVersion = Mod.Version.Latest
+            industrialCraft.activeVersion = Mod.Version.Latest
+            item = modPack.findItem 'wrench'
+            item.name.should.equal 'Wrench'
+            item.modVersion.mod.name.should.equal 'Buildcraft'
+
     describe 'findItemByName', ->
 
         it 'finds the requested item', ->
@@ -57,7 +82,7 @@ describe 'mod_pack.coffee', ->
         it 'returns all data for a regular Minecraft item', ->
             display = modPack.findItemDisplay 'bed'
             display.iconUrl.should.equal '/data/minecraft/1.7.10/images/bed.png'
-            display.itemUrl.should.equal '/item/bed'
+            display.itemUrl.should.equal '/mod/minecraft/bed'
             display.itemName.should.equal 'Bed'
             display.modSlug.should.equal 'minecraft'
 
@@ -65,13 +90,13 @@ describe 'mod_pack.coffee', ->
             buildcraft.activeVersion = '6.2.6'
             display = modPack.findItemDisplay 'stone_gear'
             display.iconUrl.should.equal '/data/buildcraft/6.2.6/images/stone_gear.png'
-            display.itemUrl.should.equal '/item/stone_gear'
+            display.itemUrl.should.equal '/mod/buildcraft/stone_gear'
             display.itemName.should.equal 'Stone Gear'
             display.modSlug.should.equal 'buildcraft'
 
         it 'assumes an unfound item is from Minecraft', ->
             display = modPack.findItemDisplay 'iron_chestplate'
             display.iconUrl.should.equal '/data/minecraft/1.7.10/images/iron_chestplate.png'
-            display.itemUrl.should.equal '/item/iron_chestplate'
+            display.itemUrl.should.equal '/mod/minecraft/iron_chestplate'
             display.itemName.should.equal 'Iron Chestplate'
             display.modSlug.should.equal 'minecraft'