ODK integration - first version
Implemented simple geocoder

Translates lat/lng to list of admin entities
submission & protocols
Merge branch 'odk' of github.com:bedatadriven/activityinfo into odk
restored comments that were auto-edited during refactoring
proper security (basic auth) + bypass in all three endpoints
only show indicators on activities with report-once frequency
First operational version
correct location impl (always create new), sitehistory integration, more
consistent authentication code