Merge pull request #193 from mverzett/master

Limitsetting scripts!
Moriond2013 json file for PromtReco-8TeV
added missing datasets
added fillstyle due to change in rootpy
added VH_HWW and fixed typo
added kwargs to retreive shape shifted 1 sigma up/down
cleanup and small changes
bigfix
revert to old rootpy method
learned how to deal with observed limits
adds something to a json file
print the sttus of your dags nicely