api key generation complete
User can create and update an application

-added support for app description, image and creating an API key
-added support for editing app information
Merge branch 'feature/create-update-apps' into feature/api-key-generation

Conflicts:
	app/controllers/oauth/applications_controller.rb
	spec/features/doorkeeper/manage_apps_spec.rb
	spec/support/page_objects/oauth2/authorizations_page.rb
	spec/support/page_objects/oauth2/new_application_page.rb
Merge branch 'devel' into feature/api-key-generation

Resolve minor conflicts:
	app/controllers/oauth/applications_controller.rb
	lib/doorkeeper_patches.rb
Merge pull request #257 from 18F/feature/api-key-generation

Feature/api key generation