added Kernel2D::initGaussian() and improved const-correctness
added Kernel2D::initGaussian() and improved const-correctness

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