Feedback Feature; Analytics Tweaks; Some Styling

@herany @okrg I create this feature on a branch in order to give you a chance to review it.
I think unsolicited feedback is super important in the early stages, so I created a really simple form to handle it.  If you have any suggestions for improvements, I am all ears!
I created app-level methods to handle trackView and trackEvent so I could put null checking in one place