implements collections and client side caching for extra questions
cleanup
major survey model cleanup
fixes additional question fields array
adds optional survey question to commutersurvey model class
nothing yet
Merge branch 'dev' of https://github.com/greenstreetsinitiative/checkin into dev
fixes problem with backwards migration 0013
migrates commuter survey - leg relation from m:n to 1:n
Merge branch 'dev' of https://github.com/greenstreetsinitiative/checkin into dev
first stab at green switch properties on commuter survey model class
Merge branch 'dev' of https://github.com/greenstreetsinitiative/checkin into dev
no 3 item tuple allowed in a choices list

…that’s why we should have tests…
reimplemented from_work_switch/to_work_switch, fixed invalid COMMUTER_MODES, removed unused
whichSwitch function, duplicated functionality of from_work_normally etc. from survey model in
leaderboard view, reimplemented checkinMatrix() to use said new functions
filled in rankings, sector list, lefthand box
Merge branch 'dev' of https://github.com/greenstreetsinitiative/checkin into dev

Conflicts:
	survey/models.py
added text and links to other pages on survey success page
fix banner image link in base template
cosmetic
added toggle for leaderboard filter options