add variables column
refactored language to use new variables column
changed $key to $name
removed not needed join of "cm_languageKey_variable" in paging
check if variable names are multiple defined
move all variables to cm_languageKey and drop table
changed script to be able to run multiple times
Merge branch 'master' of github.com:cargomedia/CM into issue-1089

Conflicts:
	resources/db/update/26.php
Added cleanUpOld() which lets CM_Paging_Log_Abstract child classes clean their entries on their own
bugfix
Amended key name
added test, removed cleanup and put the deleteOld() calls directly into CLI
removed debug stuff
Adjust Local filesystem adapter to not follow symlinks when deleting
Make App_Installation adjustments
Add tests to cover symlink behaviours
Streamline css prefixing
Make cleanup methods non-static
Fix maintenance cli error, use getProtectedMethod instead of invokeMethod (remove invokeMethod fully)
Add addCssClass method