Added wx.stc.StyledTextCtrl, to interact with GCODE. This will a be
better view and interaction that the previous list control. Also preparing
to be able to modify GCODE while in IDLE state.
Fixed issues with Gcode control toolbar updates (went with regular wx.Buttons for now).
Added embedded icons for Gcode control toolbar, plus clean-up in general.
Fixed bug with stop command missing an require increment in PC.
Also fixed bug with StyledTextCtrl Update UI disabling AutoScroll.
Remove big embedded images, replaced with small data same quality images.
Also add credit to icons src as per license for icons.
revert some changes...
Merge pull request #1 from duembeg/bp/STC_STYLED_TEXTCTRL

Bp/stc styled textctrl