added stream output for std::pair
added stream output for std::pair

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