Implement a simple spinner component and use it when debugging is turned on

The fps counter can be enabled by setting the following key in /etc/palm/luna.conf

[Debug]
PiranhaDisplayFps = true

Signed-off-by: Simon Busch <morphis@gravedo.de>
Merge pull request #21 from webOS-ports/morphis/fps-counter

Implement a simple spinner component and use it when debugging is turned...