Cosa/Rotary Encoder and Dial driver

New Cosa driver class for Rotary Encoders. Support for direction detection and dials with min, max and initial value. Uses the Cosa support for Interrupt Pins and the Event manager. See example sketch; https://github.com/mikaelpatel/Cosa/blob/master/examples/Sandbox/CosaRotaryEncoder/CosaRotaryEncoder.ino

Cheers!