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
Some minor fixes
Merge pull request #3 from mungo/develop-ascraeus

Fix Syntax
Merge pull request #2 from Philipp-K/develop-ascraeus

Some corrections on common.php