Add Someday model for tracking habits one wishes to implement.

: #feature #db #test
Add API for retrieving the current user's somedays.

: #feature
Display Somedays on main page.

: #ui #feature #angular
Moved somedays angular code into its own files.

: #ui #angular #refactor
Moved somedays.coffee to someday.coffee to reflect its name better.

: #infrastructure
Add API for creating somedays.

: #feature #test
Add button to create someday habits.

: #angular #ui #test #feature
Add API for deleting somedays.

: #feature #test
Add delete button for somedays.

: #ui #feature #angular
Add API for renaming somedays.

: #feature #test
Add rename somedays UI.

: #ui #angular #test
Clean up padding between habits and somedays.

: #ui
Fix bug where creating an old habit and then immediately flagging a
day would cause it to exception.

: #ui #bug
Restyle habit checkboxes.

: #ui #test