added cygwin support don't output "-I/usr/include" if extra headers are found there
added cygwin support
don't output "-I/usr/include" if extra headers are found there

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