Skyrim specific Col Filter values

Adds Skyrim specific values for "Layer" and "Col Filter" in bhkRigidBody. "ColFilter" renamed to "Flags & Part number".

Changed "Unknown Integer" after each of Skyrim Material in Chunk Materials array of bhkCompressedMeshShapeData to "Copy of Skyrim Layer". Because this value is 32bit long but Skyrim Layer is stored only in 1 byte, special enum called "SkyrimLayerCMSDM" created. It has identical contents as enum "SkyrimLayer" and only storage type is set to "uint".