Update purchase tracking to work with GA goals

Need an integer value field.

app/views/account/SubscriptionView.coffee

@@ -123,7 +123,7 @@ class PersonalSub
     me.set('stripe', stripeInfo)
 
     me.once 'sync', =>
-      application.tracker?.trackEvent 'Finished subscription purchase', revenue: 0
+      application.tracker?.trackEvent 'Finished subscription purchase', value: 0
       delete @prepaidCode
       @update(render)
     me.once 'error', (user, response, options) =>

app/views/core/SubscribeModal.coffee

@@ -144,7 +144,7 @@ module.exports = class SubscribeModal extends ModalView
     me.patch({headers: {'X-Change-Plan': 'true'}})
 
   onSubscriptionSuccess: ->
-    application.tracker?.trackEvent 'Finished subscription purchase', revenue: @purchasedAmount / 100
+    application.tracker?.trackEvent 'Finished subscription purchase', value: @purchasedAmount
     Backbone.Mediator.publish 'subscribe-modal:subscribed', {}
     @playSound 'victory'
     @hide()

app/views/play/modal/BuyGemsModal.coffee

@@ -89,7 +89,7 @@ module.exports = class BuyGemsModal extends ModalView
     jqxhr.done(=>
       application.tracker?.trackEvent 'Finished gem purchase',
         productID: @productBeingPurchased.id
-        revenue: @productBeingPurchased.amount / 100
+        value: @productBeingPurchased.amount
       document.location.reload()
     )
     jqxhr.fail(=>