DeTool: implement cleaning up gcode for SD card printing. Removes empty lines and comments, and adds EOF.
DeTool: implement cleaning up gcode for SD card printing.
Removes empty lines and comments, and adds EOF.

ambrop72/aprinter,fixator/aprinter,fixator/aprinter,ambrop72/aprinter,johnkingsley/aprinter,ambrop72/aprinter,johnkingsley/aprinter,ambrop72/aprinter,johnkingsley/aprinter,johnkingsley/aprinter,johnkingsley/aprinter,johnkingsley/aprinter,johnkingsley/aprinter,ambrop72/aprinter,ambrop72/aprinter,fixator/aprinter,fixator/aprinter,ambrop72/aprinter,fixator/aprinter,fixator/aprinter