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
Merge branch 'master' of github.com:cargomedia/CM into issue-1089

Conflicts:
	resources/db/update/31.php
Use phrase instead of key/name
Formatting, var names
Merge pull request #1089 from mariansollmann/issue-1089

simultaneous setTranslation() can throw exception