libhandy: update to 1.6.1
libhandy: update to 1.6.1

* Enable gtk doc.
* Add gi-docgen for docs.
* Install license file.

fabiangreffrath/MINGW-packages,oscarfv/MINGW-packages,oscarfv/MINGW-packages,oroppas/MINGW-packages,stahta01/MINGW-packages,oscarfv/MINGW-packages,stahta01/MINGW-packages,JPeterMugaas/MINGW-packages,lhmouse/MINGW-packages,lhmouse/MINGW-packages,fabiangreffrath/MINGW-packages,lhmouse/MINGW-packages,Alexpux/MINGW-packages,oscarfv/MINGW-packages,oroppas/MINGW-packages,oscarfv/MINGW-packages,lhmouse/MINGW-packages,Alexpux/MINGW-packages,Alexpux/MINGW-packages,lhmouse/MINGW-packages,oscarfv/MINGW-packages,oroppas/MINGW-packages,fabiangreffrath/MINGW-packages,lhmouse/MINGW-packages,JPeterMugaas/MINGW-packages,stahta01/MINGW-packages,Alexpux/MINGW-packages,fabiangreffrath/MINGW-packages,oroppas/MINGW-packages,JPeterMugaas/MINGW-packages,JPeterMugaas/MINGW-packages,oroppas/MINGW-packages,stahta01/MINGW-packages,Alexpux/MINGW-packages,JPeterMugaas/MINGW-packages,stahta01/MINGW-packages,stahta01/MINGW-packages,fabiangreffrath/MINGW-packages,oroppas/MINGW-packages,JPeterMugaas/MINGW-packages,fabiangreffrath/MINGW-packages,Alexpux/MINGW-packages