Work in progress upgrade to Squeak 3.4-1 VM.

Works, but the input is very sluggish.
remove legacy sq.h file.
Updated event handling logic for ioGetNextEvent()
updating sd card with a Squeak 3.2 image.
Merge pull request #1 from pablomarx/squeak341

Updating to Squeak v3.4-1 VM with Squeak v3.2 image.