Updating the unfolding pull checks

- Updated the scripts to perform pull checks for combination of channels
- Added the workflow script, doing everything automatically for our nominal k-values

Results for MET (old binning) look good (the pull width closer to 1):

![screen shot 2014-05-08 at 16 50 56](https://cloud.githubusercontent.com/assets/2600844/2917677/9470cce0-d6c8-11e3-9592-dd0ce70ac188.png)

Other variables currently running.