style... almost pep8
use default_dict instead of postgres-only distinct() for compatibility
add season tags to subject detail view
fade the icons a bit
fix sprites and move lesscss stuff to the right place
Fix course title underline so that it doesn't extend under labels
seasonally colour the tags
Merge pull request #20 from uniphil/compatibility/db/distinct

SQLite Support
Merge pull request #17 from uniphil/enhance/seasontag

Have a fall/winter/summer indicator next to course listings so you know when they're offered
Hopefully fixed prod subject page bug...
removed empty careers on subject page