make variables available with VIGRA_ prefix (less likely to be overwritten /unusable)
make variables available with VIGRA_ prefix (less likely to be overwritten
/unusable)

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