added migration for new fields in osm.models -- including default for migration.
removed default values used for schemamigration
added tasks for osm import
change order of tasks
Add fab command to restart celery worker and fix some requirements files
Add restart of celery into deploy command
pytz needed for timezones
fixed typo
task should return True.
Merge branch 'master' of github.com:mfa/kirchenreich

Conflicts:
	requirements.d/all.txt
added Ref model for osm reference caching (including admin and migration)
added celery task for refs insertion
splitted update_refs from add_churches task
bugfix
added insert_church_way task with test for missing references and retry_delay in that case
added missing test for ref update need in insert_church_way
Fix proces name of celery worker process
Merge branch 'master' of github.com:mfa/kirchenreich
bugfix in insert_church_way-task
Merge branch 'master' of github.com:mfa/kirchenreich