added a errormessage for nonunique tagnames
added new build
fixed message for put and patch
fixed assert
added error code instead of translation key
added new build
fixed line length
changed error code to const
Merge branch 'develop' of git://github.com/sulu-cmf/SuluTagBundle into feature/error-message-nonunique-tagname
fixed code style
Merge branch 'feature/error-message-nonunique-tagname' into develop