- fix nullptr name assignment error on CKObject.
- remove slot check for CKTexture::GetFileName in BMap. return nullptr, not throw error when no slot to get file name.
- provide lit mode and wrap mode getter and setter in CKMesh.
- add lost flags setter in CKMesh.
- show lit mode and wrap mode data in Unvirt.
- add interface for lit mode in BMap, because some old Ballance map use lit mode to light objects.
- expose a raw c callback when creating bmap to allow user decide how the log output by themselves.
- change python bindings for BMap interface changes.
