add navbar
Fix users table.
Top navbar layout improved.
Changed styles for total user info.
Replace social links & navbar nav from right to left.
add flash_success in web/admin/users_controller#edit
modify users_photo_uploader
Main partner's and sponsor's logos added.
Borders added.
add authorization after password recovery
remove blank option from role select
capitalize user city name in participant list
Clearfix added.
add downcase user email migration
add presence true validation for password_confirmation field
add remove user email case sensitive
Merge branch 'feature/add_navbar' into develop
Merge branch 'feature/add_navbar' into develop

Conflicts:
	app/assets/stylesheets/custom.css
	app/views/layouts/web/shared/_social.html.haml
	config/locales/ru.yml
Merge branch 'feature/116-users-table-design-fix' into develop

Conflicts:
	.gitignore
Sponsors added.