Add in Mixpanel

Some initial events:

* [x] App Initialized
* [x] Pages Loaded
* [x] Products clicked
* [x] WLT's
* [x] Sign Ups - How did they get to the signup
* [x] InfiniScroll paginated
* [x] Explore Filters
* [x] Errors
* [x] Authenticated
* [x] Email Login
* [x] Facebook Login
* [x] Facebook Login Click
* [x] Login Modal Register Click
* [x] User Registered
* [x] Punchcard Viewed
* [x] Header Badge Clicked