Remove libgd

Nothing modern should use it anyway
Complete the removal of the search provider

It's useless because it's not actually implemented, and it's
probably not very useful for a general purpose GTK app. Also,
it's very gnome specific.
Add NEWS

For the initial "release"
Add COPYING

Another copy of the BSD license, to be installed in $(docdir)
Stop relying on the launcher binary for traditional activation

The launcher binary is not namespaced, and thus should not be
distributed in "independent" package binaries (although it can be part
of an official distribution), so we can't rely on it for the
.desktop file, and even in the case of DBus activation,
GDesktopAppInfo checks if Exec exists.
Add the infrastructure to build RPMs

A spec file and a handy Makefile target