To print:

 * Turn on printer and connect computer.
 * Start pronterface
     cd ~/things/Reprap/reprappro-software.git/
     ./pronterface.py 
 * Select "connect", wait for printer to connect
 * Turn on the hotend and bed heaters
 * "Load file", select the .stl file.  It will be sliced.
 * "Load file", select the _export.gcode file.  It will show up on the RHS.
 * "SD" / "Upload", accept the suggested filename (but remember it)
   and when it is done, turn on the hotend and bed heaters again
 * Home all
 * Pick ooze off nozzle with fine-nosed pliers
 * Wait for bed (and hotend) to get up to temperature
 * Pick ooze off nozzle with fine-nosed pliers
 * "SD" / "Print", select the file you uploaded earlier
 * While waiting for it to start (~1min?)
   pick ooze off nozzle with fine-nosed pliers
 * Watch while it starts and make sure that the skirt sticks to
   printbed and nothing gets tangled
 * Check that filament feed path from feedstock coil looks good.