wip: editing the GLM part
Small update of the paper
Updates on the dmtx part to make a nice listing
Improved dmtx figure
Completed the text on group statistics - not very inspired
Added blob stuff
Added figures for functional landmarks
Added visualization stuff
Spell-check
Added make targets
NF: add show target to Makefile
Ignore another build output file
Update our tex from dipy_paper; disable multicol

usepackage{multicol} looks like it was messing up the formatting of the
title page, at least for me.

Take preample tex from dipy_paper where we can, they were working on it
longer than we have been.
Add updates to bibliography from dipy paper
ENH: A detail on visualization
ENH: Added a  script for 3d viz
add affine registration code example