[Initng] powertweakd initscript

[Ismael Luceno]

Dark Apostrophe escribió:
> Hello. I asked on IRC about my initscripts and ismael found several I had for 
> which there are no ifiles. He asked me to mail them in individually, and 
> that's what I'm doing now. This one is for powertweakd, a CPU power usage 
> regulator daemon.
> 

IIRC, it is a tool for tweaking the kernel, and low-level hardware
settings (like latencies).

Added to svn. :)