added missing comparison functions
added missing comparison functions

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