Initial commit
Draft EM algo for factor analysis.
Factor analysis EM draft.
Updated FactorEm to include row indices
Added property to FactorEM
Added time alignment history
Added factor EM with genetic selection.
Refactoring + probabilistic PCA
Added probabilistic PCA with re-normalization
Refactoring
Refactoring
Added option for non-random initialization of W in FactorEM.
Updated non-random W initialization
Fixed bug in Ksi estimation in FactorEM, and also added iterative
FactorEM2 (will rename later)
New output method
Added portfolio data structures, time aligning, and downloading prices
from Yahoo.
More portfolios to download
Temporarily loading open instead of close price...
Added new portfolio import
Working on new time series data classes