Visual Studio Builds: Link to LibPNG-1.6
Add note on libpng for Visual Studio Builds

Tell people that the Visual Studio project files will normally link to
the latest stable release series of libpng that is supported by the
codebase, and people can still use libpng 1.0.x-1.6.x if they choose
to do so by changing some settings during the build.
[l10n] Updated Italian translation.
Updated Norwegian bokmål translation
2.29.1
Bump version
Distribute test data

Otherwise installed tests fail to run out of a tarball release.
Use GLib test setup for installed tests
Forgotten file
tests: Fix up pixbuf tests to know how to find data files

These tests were broken by: 8ec55ff29e0626a05a3aa9d92060e28767ee142f

Previously we were relying on hand-written .test files
which used sh -c and wildcard expansion, but with modern
GLib we can just use g_test_get_dir() to find the datadir
relative to our binary path.
tests/pixbuf-randomly-modified: Drop iterations to 10

1000 iterations takes far too long for automated testing;
we'll get incremental coverage over time even with just
10, and the test can of course be run manually.
Merge branch 'master' of git://git.gnome.org/gdk-pixbuf

Conflicts (resolved by JE):
	build/win32/vs10/README.txt
	build/win32/vs9/README.txt
JOHNE - Bump version