commit: Hide Donation Function
Merge branch 'donate-rmv' of https://github.com/yuta-hono/piwik into donate-rmv

* 'donate-rmv' of https://github.com/yuta-hono/piwik:
  modified
  modification
  add modification
  modification
  Modify bug on @CoreHome/_headerMessage.twig
  Hide Donation on feedback page