commtrack settings UI
settings validation
sms uniqueness validation
procedurally generate action keys
misc fixes
tweaks to commtrack settings UI
UI for location hierarchy types
location hierarchy admin settings respected
default location hierarchy for new commtrack domains
Merge branch 'master' into commtrack

Conflicts:
	corehq/apps/commtrack/models.py
	corehq/apps/domain/templates/domain/admin/commtrack_settings.html
	corehq/apps/users/templates/users/users_base.html
Merge pull request #717 from dimagi/commtrack

commtrack settings UI