adding mutau-soft to the standared workflows

- added cgs and unc files for mutau-soft event categories 10 11 12 13 15 16
- added mutau-soft event categories to add-bbb-errors.py
- added mutau-soft event categories to setup-htt.py
- added option to doDM.py to add mutau-soft
 - this only applies to 8TeV. 

NB: 
this commit relies on the latest commit by Nadir. it is not compatible by earlier commits by Nadir nor by Andrew. What is not yet treated by any tools is the hadd of the mutau soft event categories into the standard file for mt.