Init PWM-able AUTO_FAN pins with SET_OUTPUT

Further refinements of TWIBus

Add working PlatformIO support

Fixup 3DRAG pins based on updated RAMPS pins

Fix acceleration and feedrate following bq/Marlin

Fix stopSDPrint so it works when paused

If the SD print is paused, it cannot be stopped

Added hyphenated strings for full graphic display

Add an i2c request handler

Strip never-translated strings from language files

Use configured feedrates, center in DELTA_CALIBRATION_MENU

Minor cleanup of SdFatUtil.h, MarlinSerial.cpp

Add support for i2c slave address

Fix serial output for MBL, M303