Qt: Add static factor methods for protocol
* lang/qt/src/qgpgmebackend.cpp (QGpgME::openpgp, QGpgME::smime): New. * lang/qt/src/qgpgmebackend.h: Declare. * lang/qt/tests/t-keylist.cpp (KeyListTest::testSingleKeyListSync): Use new functions.
This replaces the cryptobackendfactory functionality from libkleo.