New permissions system added. Building Admin::* around permissions
Added Permissions Controller and improved creation of nodes
model validations
Fixed some broken links and changed some Bootstrap styles.
Merge branch 'robl'

Conflicts:
	app/controllers/admin/agencies_controller.rb
	app/controllers/admin/brands_controller.rb
	app/controllers/admin/ideas_controller.rb
	app/controllers/admin/permissions_controller.rb
	app/controllers/admin/projects_controller.rb
	app/models/agency.rb
	app/models/brand.rb
	app/models/idea.rb
	app/models/permission.rb
	app/models/project.rb
	app/models/user.rb
	app/views/admin/agencies/edit.html.erb
	app/views/admin/agencies/index.html.erb
	app/views/admin/brands/edit.html.erb
	app/views/admin/brands/index.html.erb
	app/views/admin/brands/show.html.erb
	app/views/admin/permissions/index.html.erb
	app/views/layouts/application.html.erb