Add support for AdaFruit 16x8 HT16K33 matrix device
Pin init as => mode
Merge branch 'master' of https://github.com/divanvisagie/johnny-five into compass

* 'master' of https://github.com/divanvisagie/johnny-five:
  started adding headingchange test for compass
  cleanup for lib/compass.js
  added loop to compass tests
  added compass test to Gruntfile
  add HMC6352 support and start unit testing compass
headingchange test