added MultiArrayView::swap()
added MultiArrayView::swap()

dstoe/vigra,timoMa/vigra,mmuellner/vigra,ThomasWalter/vigra,capturePointer/vigra,mmuellner/vigra,ThomasWalter/vigra,dagophil/vigra,mmuellner/vigra,dstoe/vigra,timoMa/vigra,funkey/vigra,ThomasWalter/vigra,funkey/vigra,funkey/vigra,funkey/vigra,timoMa/vigra,mmuellner/vigra,xiwei-zhang/vigra,capturePointer/vigra,capturePointer/vigra,dstoe/vigra,dstoe/vigra,xiwei-zhang/vigra,timoMa/vigra,dagophil/vigra,xiwei-zhang/vigra,xiwei-zhang/vigra,dagophil/vigra,dstoe/vigra,ThomasWalter/vigra,mmuellner/vigra,dagophil/vigra,xiwei-zhang/vigra,capturePointer/vigra,timoMa/vigra,funkey/vigra,timoMa/vigra,dagophil/vigra,capturePointer/vigra,funkey/vigra,xiwei-zhang/vigra,mmuellner/vigra,ThomasWalter/vigra,capturePointer/vigra,dagophil/vigra,funkey/vigra,xiwei-zhang/vigra,dagophil/vigra,ThomasWalter/vigra,capturePointer/vigra,ThomasWalter/vigra,dstoe/vigra,dstoe/vigra,timoMa/vigra,mmuellner/vigra