- fixes for conformance tests (cropping window, ALF, long term reference pictures, virtual boundary, WPP)
- added pkgconfig info
- fixes for non-420 chroma formats, most notably 422
- fixes for picture output problem (issues #17)
- restructured reference picture list parsing
- cleanup of CMake files
- moved conformance tests definitions out of the main CMakeLists.txt
- fixes for memory leaks, address sanitizer problems
- removal of obsolete code
- various fixes