git subtree add --squash --prefix OMPlot/qwt https://git.code.sf.net/p/qwt/git develop
git rm -r qwt/doc qwt/classincludes qwt/examples qwt/playground qwt/designer qwt/tests
Fix hard coded install path in qwt/qwtconfig.pri
Change the lib name from qwt to omqwt in qwt/qwt.prf and qwt/src/src.pro
