Added admin files to add zscores and numSubjects to the database. Als…

[11rohans]

…o updated interface to show a column for zScores

[davclark]

This looks great!

@11rohans one suggestion I have would be to separate out commits where you squash whitespace (which is great!) from commits where you do substantive work. If you look at the "Files Changed" tab you'll see that your changes are way down below a bunch of deleted whitespace.

@r03ert0 Do you want to have a look at this? Given that it's a database change, i would like your approval (and make sure you can run this). If not you, then at least @jbpoline?