Expose Gyro isCalibrated accessor property

Signed-off-by: Rick Waldron <waldron.rick@gmail.com>
Double the number of readings for gyro calibration

Signed-off-by: Rick Waldron <waldron.rick@gmail.com>
Allow gyro recalibrations
Gyro emit data or change event when calibrated

Signed-off-by: Rick Waldron <waldron.rick@gmail.com>
Adding Notes To Piezo

- Updated notes / octaves available to the Piezo Object.
- Added script piezo-note-scale.js to ./eg/
Updated Notes

- renamed eb to d#
- renamed bb to a#
- updated piezo-note-scale.js to reflect new notes
- updated test/piezo.js to account for new notes
Merge pull request #424 from McDonnellDean/piezo_note_additions

Note Additions For Piezo (For Discussion)
v0.8.3

Signed-off-by: Rick Waldron <waldron.rick@gmail.com>
Bubble the string event from IO layer
v0.8.4
Adds Dean McDonnell to contributors
Clean up in test/board.js

Signed-off-by: Rick Waldron <waldron.rick@gmail.com>
Enable initializing Servo instances on analog pins.
v0.8.5
Initial Led.Digits.prototype.print
v0.8.6
LedControl defaults to on

Signed-off-by: Rick Waldron <waldron.rick@gmail.com>
v0.8.7
Merge branch 'master' of https://github.com/rwaldron/johnny-five

# By Rick Waldron (15) and Dean McDonnell (2)
# Via Rick Waldron
* 'master' of https://github.com/rwaldron/johnny-five:
  v0.8.7
  LedControl defaults to on
  v0.8.6
  Initial Led.Digits.prototype.print
  v0.8.5
  Enable initializing Servo instances on analog pins.
  Clean up in test/board.js
  Adds Dean McDonnell to contributors
  v0.8.4
  Bubble the string event from IO layer
  v0.8.3
  Updated Notes
  Adding Notes To Piezo
  Gyro emit data or change event when calibrated
  Allow gyro recalibrations
  Double the number of readings for gyro calibration
  Expose Gyro isCalibrated accessor property