Merged in chrishamm's changes to Network, PrintMonitor, and his support
for firmware updates from SD card
Fixed print monitor issue that threw out the layer count and time
estimates when there was an initial extruder priming move in the start
gcode
Merged in chrishamm's changes including OutputBuffer fix, changes to
Roland pin numbers, rr_configfile support in web server, and Roland and
inkjet pin numbers moved to Pins_duet.h
Merged in wrangellboy's http response changes for compatibility with
Edge browser
Other minor changes