Issue #218, Add winner to migration
Issue #218, Add model of competition
Merge branch 'master' into C3_marwa-mehanna_#218_competition_crud

Conflicts:
	Idearator/app/models/competition.rb
Issue #218, Add competition controller

finished submit/edit/show
Issue #218, Add attr accessible for competition
ISsue #218, Add routes for competitions
Issue #218, Add show view for competitions
Issue #218,Add edit view
Issue #218, Add form of submiting a new competition
Issue #218,Add new view
Issue #218, Add index view
Issue #218, Add auto complete to tags of competition
Issue #231 initial commit button and stream in competetion page
Issue #231 enroll idea from competition page, update
Issue #231 prelimnary tests and docs