Zend\Db:
- added Literal object to Zend\Db\Sql and Zend\Db\Sql\Predicate
Zend\Db\Sql
* added tests for Literal support
Merge branch 'feature/db-sql-literal-type' of git://github.com/ralphschindler/zf2 into feature/3599
[#3599] CS fixes

- EOF ending
Merge branch 'feature/3599' into develop

Close #3599