remove ventEditType time presents validators
add twitter account link
refactoring social networks controllers
refactoring social networks routes
Twitter-account linking layout improved.
Twiiter linking form elements more changes.
Merge branch 'feature/add_twitter_account_link_#156' into staging

Conflicts:
	app/controllers/web/social_networks_controller.rb
	app/views/web/accounts/_form.html.haml
	config/locales/ru.yml
	config/routes.rb
	test/functional/web/social_networks_controller_test.rb