added quaternion.hxx (untested)
added quaternion.hxx (untested)

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