added spline 4 tests
added spline 4 tests

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