clip the sampler balls for emcee to the prior
fix sampler_ball code stupidity
vectorize lognormal prior, and add walker evolution plots to read_results, some changes for truth values in corner plot
add a bounds method to parameters, some fixes for read_result with separate gp, and make sure plotting_range vectorizes correctly
rewrite lnprob to use george GPs if available, rewrite gp.py to emulate george syntax
working now with mp