Pcbnew: 3D view: Better 3D rendering (fix some artifact issues). Add a realistic rendering mode.
3D-viewer: minor fixes and enhancements
3D-viewer: minor fixes and enhancements
* Fix building of Github plugin support for Windows using Mingw-w64
* Pre-built binaries for OpenSSL can be used from the LuaDist project: https://github.com/LuaDist/openssl/releases
* Building of Boost libraries fixed for Mingw-w64 for github plugin