Add PostGIS geo field and it's GeoJSON serialisations
Merge branch 'master' of https://github.com/City-of-Helsinki/linkedevents

Conflicts:
	events/models.py
	events/views.py
	linkedevents/settings/base.py
	linkedevents/settings/dev.py
Merge branch 'master' of https://github.com/City-of-Helsinki/linkedevents
Fix context related problem with location field
Merge remote-tracking branch 'thanhiro/master'