added tests for the new parser including not operation, fixed all search tests due to mendatory double quotes for search values
extended parser grammar to allow escaped quot,

 also added test to ensure that behavior
removed german test data and added negative test for missing quotes in filter value
Merge pull request #70 from osiam/osgn-254-parser

Osgn 254 parser
[fix] removed useless test
[cleanup] removed useless and wrong java doc
[cleanup] switching from GStrings to regular strings