NOVAD && NOVALIB: Make KNN_NORMALIZATION a config variable

Seems to work okay; honestly, I wouldn't really know if it didn't, given how
opaque the classification algorithm is to me in technical terms, but I used
the new setup, ran some scans, and those hosts showed up as hostile, so I 
will assume the best.

Close #641
NOVAD: Close #630

Removed TODO, removed commented code.

close #630