added Diff2D::operator[] and operator<<(std::ostream &, Diff2D)
added Diff2D::operator[] and operator<<(std::ostream &, Diff2D)

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