code: function hashTransform(input, transformKey){
  	// Use MD5 - may not be very collision-resistant, but it should do for simple collision avoidance.
  	var hasher = crypto.createHash('md5');
  	hasher.update(input + '|' + transformKey, 'utf8');
  	return hasher.digest('hex').toLowerCase();
  }
docs: Helper function. Takes a commandID (or any string, really) and a key and returns a transformed commandID.
  The hash function should be acyclic (and probably is).
  Used in tryWith as the default transformation function.
  
  @param {String} input The input ID to transform.
  @param {String} transformKey The key to apply to the input.