Merge haml and html directories
Link chart playcounts to user/library/artist
Quieten South logging
Make Chart a Sequence

* Alter tests to subclass django.test.TestCase
* Tests with database subclass django.test.TransactionTestCase
Split chart HTML into separate template
Prominent header
Remove who
Weekly plays of artist

* Put UserManager methods on User
* Remove several unused sections
Move lex static data to app
Use require.js for lex javascript
Load and weekly plays for artist on li.barchart click
Move chart average calculation to client