Start up ignore.
Added code to ignore a fixed number of samples when connecting to a source.
This will allow the system to only average good samples, and not the start up
transients.

	modified:   motioncalc.go
Simplified averaging logic.
It now uses another loop.
Removed fmt debugging.

	modified:   motioncalc.go
Velocity Intergration.
Added basic intergrator to try and calculate velocity.
	modified:   motioncalc.go