Added a 'stitch_avg_outcome' function, which builds an average outcome from a list of masks used in cross validation. Added this function for writing the feature scores of test results.
Fixed bug where outcome returned by stitch_avg_outcome had summed prediction quality instead of average prediction quality.
Merge pull request #13 from rybern/refactoring

Added a 'stitch_avg_outcome' function, which builds an average outcome f...