Completed initial Black-Litterman Function

-Added function that calculates assets weighted by market capitalization
-Implemented Inverse Optimization
-Implemented formula to calculate Black-Litterman Expected Returns
-Used expected returns computed from Black-Litterman and applied Mean
Variance Optimization as before

Pending Errors: Black-Litterman returns are not intuitive
SIngle Period MVO and Black-Litterman return the same optimal portfolio
weights.

There is likely an error in sMVO.m