Upgrade to Django 1.7.1
Merge pull request #4 from ccnmtl/django-1.7

Upgrade to Django 1.7.1.
Admin section WIP
build after rebase
DRF 2.4.4
style fix
Add highcharts 4 to WR admin
wip
Some front-end refactors
More refactoring
wip
Fix puzzle init regression
Fix potential bug
WIP moves checker
Making some progress on persistent moves
Delete moves if the puzzleRound isn't loaded
Simplify puzzle route
Some cleanup
Unload saved moves from the store
WIP -- finding workaround for Ember Data bug:

https://github.com/emberjs/data/issues/1913