1.0
	* Added support for L2 penalization(alpha=0);
	* hqreg: changed argument "loss" to "method" and an option "squared" to "ls".

1.1
	* loss.hqreg.R: corrected a mistake in function "qloss".

1.2
	* cv.hqreg: added two new arguments, "fold.id" for predefined cross-validation 
	  folds, and "type.measure" for inclusion of general error measures "mse" and 
	  "mae".
	* loss.hqreg: modified definition depending on "type.measure".
