More tests (not 100% final yet) of massNLL and first fully operationg version for GoodneddOfFit  

- added some printouts for massDeltaNLL and some more changes for better usability.
- added use of tmp directories for batch jobs in lxb-limit.py (in principle tested for transparency with old methods, needed for goodness-of-fit).
- added full functionality for calculations and collection of toys for goodness-of-fit in limit.py and submit.py.
- one fix in plotting of mass NLL (while final test is still outstanding).