Android: Add android build files to source tarball

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Makefile.am: Add Xcode dir to EXTRA_DIST

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Remove unused THANKS file

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Nathan is a maintainer now, so add him to the README

Signed-off-by: Hans de Goede <hdegoede@redhat.com>