Combined p-values with the performance metrics

Added Ledoit-Wolf Sharpe ratio testing

Fixed returns calculation

Added risk-free rates for Sharpe calculation

Fixed cumulative excess return calculation

Added plotting of returns and volatilities

Added printing of tables

Fixed plotting

Added plotting of cumulative excess return

Added Information ratio and the option to use equal weighted data

Fixed errors in winner & loser strategies, commenting

Fixed winner and loser strategies

Fixed timing issue

Added plotting for momentum and contrarian strategies

Added momentum and contrarian strategies