Add Meson build system
@esodan
Submitted by Daniel Espinosa Ortiz Link to original bug (#790741)
Description
I've added support for Meson build system in 'meson' branch.
I would like to know if there is any complaint about it, before to push it to master.
Some review about meson branch, is really welcome.
https://git.gnome.org/browse/libgee/commit/?h=meson&id=3fe1b9d4dbf488f3b8ff6f9102d496b34090dc4e
Version: git master