Merge branch 'master' into subscription

* master: (175 commits)
  some coding style improvements
  added .idea project folder to gitignore
  use correct setUp method and parent calls.
  Correct German plugin manager translation (download != install)
  correct return in sendDigest()
  Fix case-insensitive match in ACL checking
  GeSHi update to 1.0.8.11
  ignore empty header on mail sending
  remove empty BCC/CC mail headers
  Galician language update
  some welcome page changes
  Combine subsequent calls to strtr into a single transformation
  changed semicolon to colon in link to welcome page to make it less confusing
  fixed wrong sidebar showing in namespaces when sidebar is disabled
  Typo fix for TL;DR
  removed a bunch of outdated and irrelevant networking acronyms
  added another place to look for logo to make it more consistent (FS#2656)
  French language update
  Czech language update
  compat js findPosX/y more closely mimic historical function
  ...

Conflicts:
	inc/auth.php
	inc/common.php
	inc/subscription.php
	lib/exe/indexer.php