PowerBook5,8 - TrackPad update

[Parag Warudkar]

My original patch is still work in progress and was intended as a starting point if someone was already adept with the trackpad stuff and was willing to help. 
(Basically it was a call for help - nothing for end users ;)

Things that remained to be done -

Either
1) Support for all PowerBooks in one code base (> Feb 2005)
Or
1) Create different versions for each one or two of them

Depending upon whether or not widely varying algorithms are needed for each variety.

2) Major part - reliably working code for finger movement detection for all Oct 2005 PowerBooks (15" itself seems to come with trackpads having entirely different characteristics.) 

3) Possibly Dual Finger Detection for scrolling - this is optional but would be good to have.

I am working on it as time and urges permit and it will speed up only if Johannes doesn't get his PowerBook or the one he gets is 0x0216 !!

Parag