Merge branch 'master' into refcounter

Conflicts:
	taglib/mp4/mp4properties.cpp
	taglib/mp4/mp4properties.h
	taglib/mpeg/id3v2/id3v2frame.cpp
	taglib/toolkit/tlist.tcc
	taglib/toolkit/tmap.tcc
	taglib/wavpack/wavpackproperties.cpp
	tests/test_mp4.cpp