function out = est_new() Creates a new estimation structure 29/09/2009: I have ambiguated this structure: 1) if .flag_per_colony == 0: .Y, .classes are regression predictions and class estimation for each spectrum in the testing dataset 2) else: .classes will contain the class estimation for each colony in the testing dataset, based on a pool among all the spectra from each colony, and .colony_pool will contain the highest corresponding voting result. To make things easier, .colony_codes will contain respective colony codes, because they are not directly obtained from the testing dataset