Added comments to roller.add_noise_to_window
Added comments to roller.add_noise_to_window
Updated Roller.resample_window and Roller.add_noise_to_window to accept windows. Unittests updated accordingly
Updated Roller.fit() to use new method Roller.fit_window()
Renamed Roller.fit() to Roller.fit_model()
Started cross validation for tuning alpha
Unittest started for lassowrapper
Suppress warnings of convergence when getting max alpha
unittest for lassowrapper.get_coef not suitable
Moved alpha cross validation to lassowrapper
Alpha cross validation implemented with sum of squares function and test cases