Delete .nfs.2005124b.075d

Removed an os file that was erroneously committed to repo.
Use ExtrinsicUtility's constants and change tabs to spaces :)
Use cPickle instead of pickle. It's faster because c.
Cleaned ground_truth file.
Fixed broken path.
Merge branch 'master' of https://github.com/NoahCarnahan/plagcomps into unit_testing
Added ExtrinsicPassage.