allocate secind serial to AHBO
disable DFU by default
add dfu_enable to config
Merge pull request #530 from wolfmanjm/feature/disable-dfu-option

Feature/disable dfu option
update firmware.bin with dfu disabled
add DISABLEMSD to options allowed on make command line
Merge pull request #531 from wolfmanjm/upstreamedge

add DISABLEMSD to options allowed on make command line
add a disablemsd version of firmware.bin
fix ls
Merge pull request #532 from wolfmanjm/upstreamedge

fix ls
implemented laser control via built in DAC output and fixed laser to stop firing when a print is aborted
removed extra line of old code
converted laser pin to union to save ram
Update config
Merge remote-tracking branch 'upstream/edge' into edge
Merge remote-tracking branch 'upstream/laser_dac' into edge
added mv command to simpleshell
added rename() to stdio.cpp
added ready() to StreamOutput
add upload command to SimpleShell
Merge pull request #534 from wolfmanjm/add/mv_and_upload_commands

added mv command to simpleshell
Merge remote-tracking branch 'upstream/edge' into edge
Added manual intervention and user instruction to the probing code