Log Any App Errors

[vcardillo]

We need a way to log driver connectivity / app issues. We can't continue to ask "what is the error"?

@marcdoan -- Thoughts?

[josephlausf]

I've set up Mixpanel for the driver app. There'll be user profiles and event tracking. Currently, I'm just tracking parts of the response from /getAllAssigned api call when user logs in. We can track additional events in the future as we see fit.