Aggiornamento libreria ALGLIB

[dimaios]

Avviso chi interessato che la libreria ALGLIB e' giunta alla versione 3.7.
La novita' principale e' la seguente.

BLEIC optimizer was significantly refactored. First, it uses new three-stage active set algorithm suggested by Elvira Illarionova, which combines gradient projection with iterations of equality constrained L-BFGS. Second, because we do not have nested inner/outer iterations, more transparent stopping criteria can be specified for algorithm. Last, it uses new constraint activation/deactivation strategy which can correctly handle degenerate constraints.

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