Tasty FFT spiral demo for the 32x16 panel

Music not included this time, sadly.
Fix submodule target path in the server Makefile.

Signed-off-by: Jérôme Benoit <jerome.benoit@grenouille.com>
Port attractor demo to 32x16 grid
Adjust parameters for better pacing
New "ember" example, contributed by April Arcus
Add a really simple burn-in test helper
Processing video test example for 16x16 grid.

It's part of a much more complex project to support long strip.

Signed-off-by: Jérôme Benoit <jerome.benoit@grenouille.com>
Remove a file commited by mistake.

Signed-off-by: Jérôme Benoit <jerome.benoit@grenouille.com>
Merge branch 'master' of https://github.com/scanlime/fadecandy
Merge branch 'master' of github.com:PimentNoir/fadecandy