unicode: Update test data files for unicode 7.0.0

https://bugzilla.gnome.org/show_bug.cgi?id=731929#c2
valgrind.h: Disable Valgrind features on x64 Visual C++ Builds

...so that builds of GLib on x64 Visual C++ can be restored, as the build
fails in line 449 of valgrind.h as it only supports MinGW/GCC for x64
Windows and simply will not build otherwise.  Make the x64 Visual C++
builds compile again by defining NVALGRIND when GLib is being built for
Windows on x64 Visual C++.

https://bugzilla.gnome.org/show_bug.cgi?id=732465
glib: Fix make dist
MSVC 2012/2013 Support: Update Property Sheet Creation

Be a bit more careful when copying and updating the property sheets, so that
we don't accidently change fields with '10' in them that are actually not
indicating the Visual Studio version.
Updated Galician translations
Fix old wiki links