Moving TimelineEngineThread into Toolkit specific code

[Paul Byrne <Paul.Byrne@Sun.COM>]

Hi Kirill,

One thing we do in Wonderland which is a little different from other UI 
toolkits is to control the systems framerate explicitly. This helps with 
responsiveness on slower system and preserves resources on higher 
powered systems. As a result it's more efficient to trigger animation 
updates on a frame cycle rather than a timer (or timed sleep).  On 
principal how would you feel moving the TimelineEngineThread into the 
toolkit specific code ?

I'm just bouncing around ideas at the moment, not formally requesting a 
change :-)

Rgds

Paul