Issue #46 , rewrote my task on a clean branch from master
Issue #46 , fixed UML
Issue #46 , UML modified
Issue #46, added tests again
Merge branch 'master' into C2_abuali_#46_invite_committee_again

Conflicts:
	Idearator/.rspec
	Idearator/app/controllers/admins_controller.rb
	Idearator/app/views/layouts/_navigation.html.erb
	Idearator/config/routes.rb
	Idearator/spec/spec_helper.rb
Merge branch 'master' into C2_abuali_#46_invite_committee_again

Conflicts:
	Idearator/config/routes.rb
Merge pull request #172 from DevYah/C2_abuali_#46_invite_committee_again

S2,1 : As an admin I can invite a guest to become a committee member