* make qt configuration in CMake more flexible
* move creating of symlinks on windows from post build event to cmake
* create symlinks for test data in cmake on windows
* switch to 7zip for extraction python indexer
* make results of sourcegrouptests case insensitive
* moved SystemHeaderSearchPaths and FramewordSeearchPaths of indexer cxx indexer commands to CompilerFlags section
* added SourceGroupTestSuite to test indexer command generation of all source groups
* removed "compile_commands.json" from gitignore, because a resource file for the tests has this name