integrated the import functionality from VigraCaster fixed range conversion in exportVolume()
integrated the import functionality from VigraCaster
fixed range conversion in exportVolume()

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