Chi2 with toys

Low stats categories will have toys run for them when calculating p-val of fit.
Added python submission and merging scripts to avoid slowdown with toys
truths in envelope
Additional clause to include the Truth order function even if p-val (chi2) < 1%
Merge pull request #272 from nucleosynthesis/nckw-runtoys-for-low-stat-chi2

Nckw runtoys for low stat chi2