Made improvements to GLUT interface
Made improvements to GLUT interface

YilunZhou/Klampt,krishauser/Klampt,arocchi/Klampt,YilunZhou/Klampt,YilunZhou/Klampt,arocchi/Klampt,hpbader42/Klampt,krishauser/Klampt,hpbader42/Klampt,krishauser/Klampt,hpbader42/Klampt,krishauser/Klampt,arocchi/Klampt,krishauser/Klampt,krishauser/Klampt,arocchi/Klampt,hpbader42/Klampt,hpbader42/Klampt,YilunZhou/Klampt