Add GoogleAnalytics event tracking

src/client/site/craft_page/step/step_controller.coffee

@@ -41,8 +41,13 @@ module.exports = class StepController extends BaseController
 
     onCompleteButtonClicked: (event)->
         return if @$completeButton.hasClass 'disabled'
+        tracker.trackEvent c.tracking.category.craft, 'mark-complete', null, @model.number
         @onComplete this
 
+    onShowToolPlan: (event)->
+        tracker.trackEvent c.tracking.category.navigate, 'show-tool-plan', @$toolButton.attr 'target'
+        return true
+
     # BaseController Overrides #####################################################################
 
     onDidRender: ->
@@ -90,6 +95,7 @@ module.exports = class StepController extends BaseController
     events: ->
         return _.extend super,
             'click .button.complete': 'onCompleteButtonClicked'
+            'click a.button.tool':     'onShowToolPlan'
 
     # Private Methods ##############################################################################