Fixed shape size of rigid bodies
Refactored and added rotation flipping of PMX
Cosmetic change of print debug code
Omit unnecessary bone transformation update

PMXBone::Local is now initialized in readPMX().
Then there is no need to update bone transformation matrices
which do not have motion.
Improved rigid body dynamics code

Now hair of Apearance Miku looks OK (TDA Miku has been already OK)