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.
I think there should be two function that scales parameters: `get_scaled_params(unscaled_params)` and `get_unscaled_params(scaled_params)`. The should just work on the `value` field in the dict. The list of actual values can then be retrieved using `[ params[key]['value'] for key in params]`.