fix urls to use simpler regex
dont use line break escape in list expression
use constants for Province choices
added an available manager for microtasks
raise exception if from_str returns multiple objects
use form for select location validatin
Merge pull request #9 from praekelt/feature/UMMELI-allow-user-to-filter-by-city

Feature/ummeli allow user to filter by city
Merge branch 'feature/UMMELI-tom-tom-pilot' of github.com:praekelt/ummeli into feature/UMMELI-qualify-for-campaign

Conflicts:
	ummeli/opportunities/views.py