Huge update affecting a many files.
Stage handles resources reset and restore.
-Refactored rendering system
-Applied minor patch to blocking api
-Improved filesystem
-Improved Masked rendering, now it is gpu based
-Improved and fixed leaks in greenlets
-Refactored Polygon
-New methods in IVideoDriver
-Renamed tool "process_xml2" to oxyresbuild
-Fixed python PIL impors
-Fixed spaces in emscripten paths
-Handle missing OpenGL(ES) extensions
-Improved examples. Added new one "UserShader2" to Demo
-Updated entry_point.cpp in all examples. It has minor changes related with oxygine api
-Added new option for building not pow2 atlasses
-and many other improves.