* Add support for detecting fontconfig.h header
* Call find_package(Freetype) since it's required
* Add support for allowing users to add additional library directories
via the GTK2_ADDITIONAL_SUFFIXES variable (kind of a future-kludge in
case the GTK developers change versions on any of the directories in the
future).
* Fixed a problem on Windows where you had to configure twice to find
the gtk & gdk libraries
This adds copyright/license notification blocks CMake's find-modules.
Many of the modules had no notices at all. Some had notices referring
to the BSD license already. This commit normalizes existing notices and
adds missing notices.