Reverse dependencies for artoo-i2c

Latest version of the following gems require artoo-i2c

Gem	Version	Date	Downloads
artoo-arduino +55.1 Thousand Downloads	`1.4.4` July 04, 2014	July 04, 2014	55.1 Thousand
artoo-raspi +38.4 Thousand Downloads	`0.7.1` February 15, 2016	February 15, 2016	38.4 Thousand
artoo-digispark +17.5 Thousand Downloads	`0.4.0` February 07, 2014	February 07, 2014	17.5 Thousand
artoo-beaglebone +13.1 Thousand Downloads	`0.3.0` February 07, 2014	February 07, 2014	13.1 Thousand