update rails
remove state index users
fix bu with state_machine
migrate db
add tabs
redirecting to users in admin panel
fix test
Merge branch 'feature/update_to_rails_4.2' into develop

* feature/update_to_rails_4.2:
  fix test
  redirecting to users in admin panel
  add tabs
  migrate db
  fix bu with state_machine
  remove state index users
  update rails
Merge branch 'release/1.0.18'

* release/1.0.18:
  fix test
  redirecting to users in admin panel
  add tabs
  migrate db
  fix bu with state_machine
  remove state index users
  update rails
  edit travis yml
  update gems
Met rge tag '1.0.18' into develop

Update to Rails 4.2 and some fixes

* tag '1.0.18':