Add logging

[Gear61]

Need to find a way that doesn't add a billion methods to the dex.

Questions to answer:

1. How many people click on the premium tooltip?
2. How many people buy premium after entering the page?
3. What options are people taking when they encounter the options to unlock a premium feature?
4. Are people using regular choice mode or presentation mode more often?
5. What's the average time spent in app?
6. What's the feature usage breakdown?