- fixing recently introduced sorting issue, refactoring, cleaning up the generic filters concept by removing the automatic sorting of data
- fixing issue when executing unit tests would invalidate tmp/cache/tracker files
- fixed edge case issue when calling several apis from one http request, and requesting recursive output, it was failing in some random cases
- adding a unit test that calls all callable api methods and check for non empty output
- 

git-svn-id: http://dev.piwik.org/svn/trunk@1041 59fd770c-687e-43c8-a1e3-f5a4ff64c105