Typo in README.md

Signed-off-by: David Jander <djander@gmail.com>
grunner.py: Added missing option to help

Signed-off-by: David Jander <djander@gmail.com>
stepper.py: Fixed self.invert calculation.

This fixes endstop detection.

Signed-off-by: David Jander <djander@gmail.com>
Improved voltage mode current scaling

Signed-off-by: David Jander <djander@gmail.com>
audiodev.c: Fixed voltage mode

Signed-off-by: David Jander <djander@gmail.com>
grunner.py: Implement move-ro (-g) mode by creating G-Code

Signed-off-by: David Jander <djander@gmail.com>
clean_extruder.sh: Added heated bed setpoint option

Signed-off-by: David Jander <djander@gmail.com>
Decreased Z speed while calibrating home position

If Z current setting is on the lower side, high speed increases chances of
step skipping.

Signed-off-by: David Jander <djander@gmail.com>