Nibbles rewrite

[Michael Catanzaro <mcatanzaro gnome org>]

Hi folks,

Nibbles 3.18 is going to be a typical boring release, but big changes
are looming for 3.20. Iulian Radu has been working on redesigning the
game for his GSoC project, with some artwork help from Allan Day, and
the result is gorgeous. He also rewrote the game in Vala, for good
measure, dramatically cutting down the number of lines of code. The
gameplay and maps are identical to the original, so it's still the same
Nibbles you already enjoy. The new implementation also avoids several
difficult-to-debug long-term issues that plague the 3.18 code
[1][2][3].

The game is in a playable state and almost everything is implemented.
Check it out on the wip/vala branch. (You will need an updated version
of libgames-support from git master.) If you want to help out with the
remaining issues, take a look at [4], where we're tracking this.
Feedback from testers is encouraged! We're currently planning to land
this in time for 3.19.1.

Michael

[1] https://bugzilla.gnome.org/show_bug.cgi?id=735027
[2] https://bugzilla.gnome.org/show_bug.cgi?id=735028
[3] https://bugzilla.gnome.org/show_bug.cgi?id=735029
[4] https://bugzilla.gnome.org/show_bug.cgi?id=754608