Spirolaterals should ask OLPC builds not to suspend while drawing

[greenfeld]

The Spirolaterals activity should ask OLPC Fedora-based builds not to suspend while its drawing routine is active.

Since it takes more than 15 seconds to complete a drawing cycle based on many user-entered patterns, and drawing is done in a step/pause/step manner which doesn't use much CPU, a XO laptop can decide to suspend before the completed image is drawn.

This can be done by created a PID-based flag file when the playback routine is started, and removing said file when drawing is stopped or completed.

Seen with Spirolaterals-23 & OLPC OS 11.3.1 os31 on XO-1.5.

[sascha_silbe]

Just to make sure: it should do this whenever powerd is available (i.e. /var/run/powerd-inhibit-suspend/ exists), not just on OLPC OS.

[godiard]

Now can use the inhibit suspend routines in the toolkit