Saasu contact sync. Initial implementation.
- task to push contacts to saasu initially
- observer to get add/change/deletes reflected in saasu
attendances fixed (subscription breaking partial); rake rego sync makes papertrail/versioned changes; activity feed display modded to work for our added models; additions to contact_groups are now part of papertrail/version system.
Merge branch 'saasu'

Conflicts:
	db/schema.rb
	lib/tasks/workflow.rake