Issue #86, Add content_for to top 10
Issue #86, Add sidebar to layout
Issue #86, Modify  _navigation
Issue #86, Modify Layout

added neseted sidebars
Issue #39, Add _navigation,applicatiom
Merge branch 'C3_marwa-mehanna_#86_bootstrap' into C3_Marwa_39_SubmitEditIdea

Conflicts:
	Idearator/app/views/layouts/_navigation.html.erb
	Idearator/app/views/layouts/application.html.erb
Issue #39,Add hints sidebar in form