Remove path detection, read path settings directly from config.
xml files are not fixed.
User will need to enter path settings manually.
Re-add OC::$SERVERROOT detection because otherwise we couldn't find
OC_Config
We need OC::$SUBURI later
Fix language detection
Make sure paths are specified manually in config.php
Merge branch 'static-path' into pellaeon-dev
Merge branch 'pellaeon-dev'