reviewed user study, modified enums + itemizes
Orient  comparison images
Added the comparison orient
Updated with orientation comparison text
Merged Artem-branch changes
Added ppt for data-char
Local text changes
Merge branch 'master' of https://github.com/bhattaca/MetaTracts_pvis
Updated Hessian pptx and hessian pdf
Updated final ppt with the comparison image
Updated Orient image
Updated comparison images
Added UserEval2

Added UserEval2 and updated it on pvisImages_final
major figure rework