Added debug compilation using 'scons debug=1' or 'export MG_DEBUG=1'
Added debug compilation using 'scons debug=1' or 'export MG_DEBUG=1'

makerbot/Miracle-Grue,makerbot/Miracle-Grue,makerbot/Miracle-Grue,makerbot/Miracle-Grue,makerbot/Miracle-Grue