Fixed bug: VMD importer: Calculation to convert bone location is incorrect.
Added light source motion import.
Added interpolation data import.
Fixed bug: Typos in warning messages.
Fixed bug: Camera rotation mode is incorrect. (Modified XYZ -> YXZ)
Fixed interpolation data import.  Bezier curve should've been applied between previous and current keyframe points...
Avoid an error when vmd file has no valid camera/lamp data.