Merge pull request #442 from wolfmanjm/upstreamedge

Fix initial pause at start of print
update firmware.bin
Spelling fixes
Merge pull request #443 from GeorgeHahn/patch-1

Spelling fixes in config
Add initial firmware retract and recover gomamnds G10/11 and M207/208
add zlift in a hacky way
fix duplicate names
add config example
add config, fix zlift direction, add M500 setting for M207
Merge pull request #444 from Smoothieware/feature/firmware-retraction

Feature/firmware retraction
redo how volumetric extrusion is calculated to ease firmware retract
Make solo moves travel the requested mm not volumetric
fw retract also retracts specified mm not volumetric
Merge pull request #445 from Smoothieware/fix/volumetric-extrusion-speed

Fix/volumetric extrusion speed
apply M200 after queue is empty