Redesign the crafting page

This introduces the new crafting page design featuring a new vertical
layout and list display of all crafting steps. It also makes it easy
to move items between the have/need sections and even from each step
into your inventory (causing a new crafting plan to be created which
doesn't plan on making that item).

* Convert the `BaseController.hide` and `show` methods to be much
  more robust in the use of CSS transitions (using a timer in case a
  transition doesn't actually fire).
* Change `hide`/`show` to use events for communicating animation
  state instead of callbacks
* Convert several controllers to fire events for communication with
  parent controllers instead of accepting functions.
* Rewrite the `CraftPageController`, `CraftPage` model and related
  Jade/SCSS files to implement the new design.
* Alter the `InventoryController` and `StackController` to allow a
  variety of action buttons, and for the events from those action
  buttons to bubble up to parent controllers
* Add the `StepController` and its related model, template, and style
  sheet as part of the new craft page.
* Tweak the `ItemSelectorController` and related files to allow for
  a variety of styles for the launcher button

src/coffee/controllers/minimal_recipe_controller.coffee

@@ -24,6 +24,7 @@ module.exports = class MinimalRecipeController extends BaseController
 
         @imageLoader = options.imageLoader
         @modPack     = options.modPack
+        @multiplier  = options.multiplier ?= null
 
     # BaseController Overrides #####################################################################
 
@@ -36,6 +37,7 @@ module.exports = class MinimalRecipeController extends BaseController
             imageLoader: @imageLoader
             modPack:     @modPack
 
+        @$multiplier     = @$('.multiplier')
         @$outputImg      = @$('.output img')
         @$outputLink     = @$('.output a')
         @$outputQuantity = @$('.quantity')
@@ -46,6 +48,8 @@ module.exports = class MinimalRecipeController extends BaseController
         @gridController.model = @model
         @outputSlotController.model = @model?.output?[0]
         @$el.tooltip show:{delay:Duration.snap, duration:Duration.fast}
+
+        @_refreshMultiplier()
         @_refreshTools()
         super
 
@@ -57,6 +61,12 @@ module.exports = class MinimalRecipeController extends BaseController
 
     # Private Methods ##############################################################################
 
+    _refreshMultiplier: ->
+        if @multiplier? and @multiplier > 1
+            @$multiplier.html "x#{@multiplier}"
+        else
+            @$multiplier.html ''
+
     _refreshTools: ->
         @$toolContainer.empty()
         return unless @model?