v2.5.1

* Fix coil current typos
* Fix for #56: Swap SDI/SDO pads in PCB view

v2.5.0

* Don't assert dir pin on init
* Remove unused data to save SRAM
* Make pins const
* Add methods for configuring microstep look up tables
* Fix problems with keywords.txt (#43)
* Restore SPI.begin until Marlin supports it
* Fix datatypes
* Only do SPI.begin once and use internal pullups for MISO
* Rework live tune
* SpreadCycle calibration tool
* Add MSCURACT
* Add MSCNT
* Reset driver and set new timing parameters
* Move initiating pins to main sketch
* Add example for pairing with AccelStepper library
* Add Fritzing part and example circuit

v2.3.0

* Add prefix to macros
* Add storage struct to be used by Marlin LCD
* Use push to reset driver on startup
* Prefix macros to avoid name clashing with STM32 Arduino Core

v2.2.1

* Restore backward compatibility
* Declare version as a preprocessor directive

v2.2.0

* Revert init lists
* New method: test_connection
* Fix typo

v2.1.5

* AVR: Fix SW SPI read command
* New method: push
* Use coolStep and report CS actual
* Add a single argument constructor

* Fix AVR compiler warnings

* Ifdefs don't catch normal variables like in DUE core
* Add comments about DUE SW transfer rates

* Conditional inclusion of Arduino header

* Cleanup
* Use 16bit pins (LPC requirement)
* Update version
* Add Software SPI implementation for all platforms
* Rename object
* Fix constructor for DUE

* SGT uses uint 7bit twos complement

* Include stdint.h for Re-Arm

* Non-conditional inclusion of Arduino.h

* Change include guard to pragma