message: adding cents to units
diff: @@ -132,6 +132,12 @@ type Samples = number;
  */
  type Hertz = number;
  +/**
  + * A Cent is 1/100th of a semitone.
  + * e.g. a value of 50 cents would be halfway between two intervals.
  + */
  +type Cents = number;
  +
  /**
  * One millisecond is a thousandth of a second.
  */
  @@ -160,6 +166,7 @@ interface UnitMap {
  degrees: Degrees;
  samples: Samples;
  hertz: Hertz;
  + cents: Cents;
  }
  /**
  