Statistics Overhaul

[NolantheNerd]

As a user, I want to be able to view several stats related to my performance:

• [x] Select a date range to filter my statistics results
• [x] See all verses ever attempted
• [x] Rank all verses by average score

[NolantheNerd]

Let's move:

• [ ] See the result of an individual attempt
• [ ] View progression over time of a verse

to a future issue, since these will take a bit more thought to implement properly.