Merge branch 'hotfix/some_fixes' into develop

* hotfix/some_fixes:
  remove sponsors from main_page
  fix locales
  new logo
  some fixes
  fix something
Merge branch 'hotfix/add_helper_current_user_decorator' into develop

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