added handling for parameters without values
adaptions for rest api
added default fields to fields API; cleanup
code review
fixed tests, by inserting query argument
fixed test in listquerybuilder: left join instead of join
Merge branch 'bugfix/rest-api' of git://github.com/sulu-cmf/sulu into bugfix/rest-api
Merge branch 'develop' of git://github.com/sulu-cmf/sulu into bugfix/rest-api
added editable fields to rest controller
added fields validation attribute
Merge pull request #39 from sulu-cmf/bugfix/rest-api

added handling for parameters without values