Add FigureDataGeneration script

This script is to serve as a place where the commands that lead to the
creation of each chunk of data that ends up in a figure will live for
this version of the manuscript. At present, it only contains code to run
masked across subject classification by tr.
fix small whitespace issues in mvpaPostProc
Improve across sub mvpa error checking graphic

Display image with subject indices, regressors, condensed_runs, and the selectors that will be used for classification.
pass <condensed_runs> to across S results processing
modify figure creation