Update ACP Part 1:
- acp/attachments.php
- acp/ban.php
- acp/board.php
- acp/common.php
Update part 2
Update part 3
Leerzeichen vor Tabs entfernt
Update part 4
Add new language files
Add new email templates
Add common.php from PhilppK
Fix whitespace Fehler
Merge pull request #1 from nickvergessen/update-3.1.0-b2

Update 3.1.0-b2
Some corrections on common.php
New versions for posting.php, viewforum.php and viewtopic.php

Conflicts:
	language/de/common.php
	language/de/posting.php
	language/de/viewtopic.php