Update URL param handling for new site

src/scripts/models/item_page.coffee

@@ -16,6 +16,22 @@ module.exports = class ItemPage extends BaseModel
 
     constructor: (attributes={}, options={})->
         attributes.modPack ?= new ModPack
+        attributes.params  ?= null
         attributes.plan    ?= new CraftingPlan modPack:attributes.modPack
         attributes.table   ?= new CraftingTable plan:attributes.plan
         super attributes, options
+
+        @modPack.on 'change', => @_consumeParams()
+
+    # Private Methods ##############################################################################
+
+    _consumeParams: ->
+        return unless @params?.name?
+
+        item = @modPack.findItemByName @params.name, includeDisabled:true
+        return unless item? and item.isCraftable
+
+        quantity = if @params.quantity? then parseInt(@params.quantity) else 1
+        @plan.want.add item.slug, quantity
+
+        @params = null