Configration changes

- Moved accel down from 1700 to 1200, jerk from 20 down to 15
- Tweaked PID_MAX and BANG_MAX
- Reversed the direction of the 2nd extruder (due to the way its mounted)
- Increased Y range to 320 (allows extruder to go off the back of the bed)
- Set E-Steps after tuning
- Enabled EEPROM
- Disabled stepper driver deactivation on inactivity until I get my 1-start Z leadscrews