added several operator*(), operator/() fixed const bug
added several operator*(), operator/()
fixed const bug

cha007/vigra,ThomasWalter/vigra,stuarteberg/vigra,stuarteberg/vigra,hmeine/vigra,psteinb/vigra,mmuellner/vigra,ThomasWalter/vigra,stuarteberg/vigra,funkey/vigra,xiwei-zhang/vigra,timoMa/vigra,xiwei-zhang/vigra,stuarteberg/vigra,kod3r/vigra,ThomasWalter/vigra,dstoe/vigra,ThomasWalter/vigra,kod3r/vigra,cbecker/vigra,psteinb/vigra,kod3r/vigra,timoMa/vigra,dagophil/vigra,martinsch/vigra,hmeine/vigra,ThomasWalter/vigra,DaveRichmond-/vigra,psteinb/vigra,stuarteberg/vigra,xiwei-zhang/vigra,xiwei-zhang/vigra,timoMa/vigra,cha007/vigra,psteinb/vigra,timoMa/vigra,capturePointer/vigra,capturePointer/vigra,cbecker/vigra,psteinb/vigra,kod3r/vigra,funkey/vigra,timoMa/vigra,dagophil/vigra,capturePointer/vigra,cbecker/vigra,cbecker/vigra,cha007/vigra,hmeine/vigra,dstoe/vigra,dstoe/vigra,funkey/vigra,funkey/vigra,psteinb/vigra,funkey/vigra,dstoe/vigra,ThomasWalter/vigra,funkey/vigra,hmeine/vigra,mmuellner/vigra,mmuellner/vigra,martinsch/vigra,xiwei-zhang/vigra,cha007/vigra,dstoe/vigra,mmuellner/vigra,hmeine/vigra,martinsch/vigra,DaveRichmond-/vigra,hmeine/vigra,DaveRichmond-/vigra,hmeine/vigra,stuarteberg/vigra,capturePointer/vigra,martinsch/vigra,DaveRichmond-/vigra,DaveRichmond-/vigra,xiwei-zhang/vigra,dagophil/vigra,cbecker/vigra,kod3r/vigra,dagophil/vigra,mmuellner/vigra,capturePointer/vigra,timoMa/vigra,capturePointer/vigra,kod3r/vigra,DaveRichmond-/vigra,xiwei-zhang/vigra,mmuellner/vigra,funkey/vigra,dagophil/vigra,capturePointer/vigra,mmuellner/vigra,dstoe/vigra,cha007/vigra,martinsch/vigra,DaveRichmond-/vigra,dagophil/vigra,martinsch/vigra,cbecker/vigra,psteinb/vigra,ThomasWalter/vigra,dagophil/vigra,kod3r/vigra,dstoe/vigra,stuarteberg/vigra,cha007/vigra,cha007/vigra,timoMa/vigra