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
Translation for groups.php, memberlist.php, search.php and ucp.php
search_ignore_words.php und search_synonyms.php überführt
Translation for app.php, captcha_qa.php, captcha_recaptcha.php, migrator.php, plupload.php
Translation for mcp.php
Changed Copyright
Missing linebreak in search_synonyms.php
Translated help_faq.php (help_bbcode.php is already done)
Translation for install.php
Merge remote-tracking branch 'philippk/develop-ascraeus' into develop-ascraeus