changed staging branch
Merge branch 'hotfix/staging_branch'

* hotfix/staging_branch:
  changed staging branch
Merge branch 'master' of github.com:ulmic/nastachku

* 'master' of github.com:ulmic/nastachku:
  fix mailers test: not_decide
  hide stachka online
  add change state to edit user
  clear program
  fix state attending for new users
  fix mailers controller find by not_decided
  add payment successful mail
  flash alert hide slower
  really remove sponsors, but keep organizators
  fix mailer controller: add flash error