added squaredNorm() tests
added squaredNorm() tests

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