This commit squashes all the changes in the Qt5 branch
relative to master.
Backward compatibility with Qt4 is retained.
Original authors:
- Philip Kaufmann <phil.kaufmann@t-online.de>
- Jonas Schnelli <jonas.schnelli@include7.ch>
* My patch for miniupnpc has made it into the latest MacPorts release: https://trac.macports.org/ticket/31354
* Documentation has been changed appropriately
* New pure-Python macdeployqt; leverages all problems with the stock macdeployqt