Added URL field to Locations and Organizers models.
Use factories start
Use factories in User model spec
Use factories for event spec

Also refactored event spec to use expect syntax
Use factories for organizer model spec
Use factories for location model spec
Use factories for tag model spec
Use factories for event integration spec
Use factories for locations integration spec
Use factories for organizer integration spec
Merge pull request #23 from carolinagc/TestRefactoringWithFactories

Using factories
Add calendar scaffold
Add calendar attribute to events
Add presence validation for calendar on events
Add more tests for calendar model spec
Remove url from calendar

This needs to be done on the model instead.
Merge branch 'MultiCalendar' of github.com:carolinagc/webcalendar into MultiCalendar

Conflicts:
	app/models/user.rb
	db/schema.rb
	spec/integration/events_spec.rb
	spec/models/calendar_spec.rb
	spec/models/event_spec.rb