Added a fileChooser to the addAuthor dialog. Multiple folders can be
selected, and all document children of that folder will be added to the
author's list of files.
User can no longer add a classifier if one of that type with the same
args has already been added.
Slight improvement to features tab FeaturesExtraction config window. Not
the best fix, will look at it once more important improvements are out
of the way
Accidentally replaced overwrote some earlier fixes. This is up to date
Added the ability to specify K for K-folds cross-validation and N where
N is the number of calculation threads to use