gmoccapy - fixed a bug in max velocity handling and added patches from gscreen

ver. 0.9.3
- included the patch for key_jogging from Chris
- support now also back tool lathes
- after M61 Q tool change, the Gui didn't leave the MDI modem resulting in problems
- the btn_view_Y2 has now a yellow background
- changing the max vel slider had no efekt, I fixed this

Signed-off-by: Chris Morley <chrisinnanaimo@hotmail.com>