minor improvements
minor improvements

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