* replaced blocking/blocked by predicates
* added test for knight of dusk (currently fails)
* added source parameter to filters and everything else that needs it
* some changes to various predicates
* test fix
* small changes to filter code
* merge fix
* fixed a test failure
* small change to Karn, Scion of Urza
* removed sourceId from filter methods and other similar places
* added new getobject method to fix some test failures
* a few more fixes
* fixed merge conflicts
* merge fix
* Gain control abilities - fixed wrong target chooses by AI (selects weakest permanent instead most powerful);
* Target of an opponent’s choice abilities - fixed that AI was able to cancel card cast, fixed wrong target chooses (Evangelize, Echo Chamber, Arena, Preacher, etc);
