Enable therubyracer as the JS runtime
Report on code coverage with SimpleCov
Use minitest-rails for testing
Ignore output from SimpleCov
Remove ability to show a single player

The index is enough to show all details of the players.
Remove XML responses of PlayersController
Clean up PlayersController with respond_with
Clean up small nits
Permit all relevant player attributes to be updated
Rewrite PlayersController tests with describe blocks
Show :error flash, too
Hide destroy link for current user
Make Player responsible for destroying dependent availabilities
Clean up playdates and availabilities controllers
Use Blind to allow controller tests to not render views
Add a TODO
Add minitest-rails-capybara for integration testing
Update dependencies