ad Timer

[Leopold Toetsch]

Attached is a test program, showing an implementations for multiple 
timers. GNU/linux only, but implementing the platform interface (and the 
sighandler/message queue) shouldn't be too hard.
I'm using milli seconds resolution, which seems IMHO reasonable. The 
Kernel only has HZ (1s/100 on many systems). Perl/Tk has it too.

Comments welcome,
leo