Add better support for turning mods on/off

* Make the Minecraft "mod" enabled at all times
* Sort the list of mods to move required mods to the top
* Automatically enable a mod which has a recipe selected (e.g., from
  a query param)

src/scripts/models/crafting_table.coffee

@@ -26,13 +26,15 @@ module.exports = class CraftingTable extends BaseModel
     # Public Methods ###############################################################################
 
     craft: ->
-        if not @name?.length
+        if not @catalog.hasRecipe @name
             @plan = null
             return
 
         toolPhrase = if @includingTools then ' includingTools' else ''
         logger.verbose "calculating build plan for #{@quantity} #{@name}#{toolPhrase} with inventory: #{@have}"
 
+        @catalog.enableBooksForRecipe @name
+
         plan = new CraftingPlan @catalog, @includingTools
         plan.includingTools = @includingTools
         plan.craft @name, @quantity, @have