tournament_id is a required param for gameSlot update
changed GameVenueAssignments massUpdate method to just update like we do for GameSlot
Merge remote-tracking branch 'origin/master' into mass_updater
added tests for gameslot and venue assignment update
Merge branch 'master' into mass_updater

Conflicts:
	src/venues/venueGameAssignment.js
fixed url
Merge pull request #96 from sportngin/mass_updater

Mass updater