Merge tag '1.0.15.2' into develop

Fix mail view

* tag '1.0.15.2': (23 commits)
  edit colors of background and text
  remove shadows
  add margin top to news title
  add gradient to nabvar
  edit text and links color
  qoutes to name
  edit logo
  button is button now
  up coverage
  fix news tests
  more tests for apu
  add simplecov
  update gems and remove unused factories
  update Gemfile.lock
  add coveralls
  Update README.md
  Update README.md
  add messages about mails for participants
  add ckeditor to mailer
  fix date on news show
  ...
edit name of winner
Merge branch 'release/1.0.15.3'

* release/1.0.15.3:
  edit name of winner