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.
Ok, then let's talk about what the best format for this would be in the settings file and in the code. The most obviously different thing among hierarchies is deltam31 (having a different sign and absolute value based on MH), but I think I agree that all of them should have different values depending on the hierarchy.