app.track => app.instrument to be less confusing

app/assets/javascripts/app/app.js

@@ -74,7 +74,7 @@ var app = {
   },
 
   /* mixpanel wrapper function */
-  track : function() {
+  instrument : function() {
     if(!window.mixpanel) { return }
     window.mixpanel[arguments[0]](_.toArray(arguments).slice(1))
   }

app/assets/javascripts/app/pages/framer.js

@@ -136,7 +136,7 @@ app.views.framerControls = app.views.Base.extend({
   trackPost : function() {
     var model = this.model
 
-    app.track("Posted", {
+    app.instrument("track", "Posted", {
       text : model.hasText(),
       photos : model.hasPhotos(),
       template : model.get("frame_name")

app/assets/javascripts/app/views/post/canvas_frame.js

@@ -56,7 +56,7 @@ app.views.Post.CanvasFrame = app.views.Post.SmallFrame.extend({
     _.delay(function(){app.page.stream.trigger("reLayout")}, 200)
 
     // track the action
-    app.track("track", "Resize Frame")
+    app.instrument("track", "Resize Frame")
   },
 
   killPost : function(){