Updating the Black-Litterman paper

Had to stop work on all the other fun things to update the paper on Black-Litterman. Turns out the section on Idzorek's method has some inconsistencies in the example tables (all the A ones don't make much sense), though the formulas and the results are all good. Anyways, that needs to be rewritten and I'm adding a section on Braga and Natale's work on TEV, probably a consistent example across Meucci and Fusai, and Braga and Natale to show how the two methods of measuring distance differ. I'd also like to add a third metric, but not finding one I like that much so far.

Then it's on to updating the website and adding some more SciLab scripts for various Black-Litterman examples.