2016-07-19 Kjell Ahlstedt Build: Fix silent builds * configure.ac: Pass yes to AM_SILENT_RULES, thus enabling silent builds. Replace MM_AX_CXX_COMPILE_STDCXX_11 by MM_AX_CXX_COMPILE_STDCXX (not necessary for silent builds). * docs/reference/Doxyfile.in: Set QUIET=YES. Update for doxygen 1.8.11 (not necessary for silent builds). Bug #768797 2016-04-10 Murray Cumming C++11: AttrIter, AttrList, Color: Make operator bool() explicit. See https://bugzilla.gnome.org/show_bug.cgi?id=626858#c4