write passing specs for Staffer#create, refactor ContactInfo validation specs
more refactoring factories
add polymorphic associations to contact info factories, refactor specs
add missing files from last commit
add spec for Staffer#edit
add Staffers#destory
add rake task to populate staffers
Merge branch 'sprint1'

Conflicts:
	spec/factories.rb
	spec/models/contact_info_spec.rb