1) Remove unnecessary includes of "Standard_OStream.hxx" file and add it only into files where it is really used.
2) Create the base interface for a file stream provider OSD_FileSystem and its inheritor OSD_CachedFileSystem that keeping last stream to be reused for opening a stream with the same URL.
3) Use OSD_CachedFileSystem object instead of RWGltf_GltfSharedIStream during Gltf reading.
OpenGl_ShaderManager::prepareStdProgramFboBlit() now tries using extension
GL_EXT_frag_depth within OpenGL ES 2.0 when OpenGL ES 3.0 is not available.
OpenGl_View::blitBuffers() now disables Depth test
when copying depth values is not supported by OpenGL ES 2.0 hardware.
Fixed building for UWP with SDK 10.0.10240.0
Fixed building TKService, TKV3d and TKOpenGl for UWP.
OSD_Environment now defines global environment map
for emulating desktop behavior on UWP.
License statement text corrected; compiler warnings caused by Bison 2.41 disabled for MSVC; a few other compiler warnings on 54-bit Windows eliminated by appropriate type cast
Wrong license statements corrected in several files.
Copyright and license statements added in XSD and GLSL files.
Copyright year updated in some files.
Obsolete documentation files removed from DrawResources.
Implemented recursive POSIX mutex instead of non-recursive,
Removed SentryNested class, implemented it's features into Sentry class
Added second constructor to Sentry class