[fprint] libfprint ported to Meson and gtk-doc

[Bastien Nocera]

Hello all,

libfprint has been ported to Meson[1] (from autotools) and gtk-doc
(from Doxygen) in git. This means that building libfprint is now much
much faster, and the API documentation is now clearer.

It would be great if driver authors could update their development
branches and report any problems.

Let me know if you run into any problems building the library, or spot
any errors in the documentation.

Other short-term plans include migrating libfprint and fprintd to
freedesktop.org's gitlab instance[2], giving the website/wiki a
refresh, and writing a guide to writing new drivers.

Cheers

[1]: http://mesonbuild.com/
[2]: https://gitlab.freedesktop.org/freedesktop/freedesktop/issues/21