0.3.1 release

add support for ARDUINO_ARCH_MBED

0.3.0 release

Improve SPI dependency

0.2.2 release

Fix __SPI_CLASS__ (#6)

- fix __SPI_CLASS__
- fix examples
- minor edits

0.2.1 release

cleanup (#5)

- minor edit

0.2.0 release

Fix #3 redo constructor (#4)

- refactor constructor interface - breaking changes.
  - minimize conditional code. -- create SPI_CLASS macro to solve it.
- reordered parameters software SPI constructor.
- update readme.md
- update examples

0.1.0 release

initial version (#1)