Llr optimizer initial

Hi Sebastian,

This is my latest pull request, which includes the initial code for the LLR Optimizer analysis. I have also updated Steve's template.py code, by taking the approach you suggested-grab his template.py from his repo and incorporate all the suggestions that I commented on myself. I also have tried to upload all data and input files, so if there are any missing, please let me know! The only thing really missing from the optimizer analysis code right now is the implementation of a few additional systematics, as well as adding the priors on the parameters that we do not wish to constrain.
To make this consistent with the minimizer function, this one should just return a list with one entry
```
[ {'llh': 12.4,
   'params': {
   'deltam31':...,
   'theta23':...
   '...'}]
```
Also, please make it return __all__ parameters for the best fit point - I don't see the benefit of just using two and from the coders point of view, hard-coding two values seems more effort than a more generic solution.