Added new optional dependency - Draco library.
RWGltf_GltfJsonParser now detects KHR_draco_mesh_compression extension,
marks accessor being compressed and redirects to compressed buffer view.
RWGltf_TriangulationReader now handles decoding of buffer view compressed using Draco.
env.bat template for genproj has been modified to allow specifying dedicated folders
with debug versions of libraries (CSF_OPT_LIB64D / CSF_OPT_BIN64D) within custom.bat.
Removed unused CSF_FREETYPE from TKOpenGl.