Keyword arguments (in addition to positional ones) are now passed on by Sampler and EnsembleSampler classes to lnpostfn (lnprobfn), and by PTSampler to logp and logl.
Added Marco Tazzari as an author, if he deserves it, as stated in the webpage: Direct contributions to the code base
Merge branch 'master' of https://github.com/mtazzari/emcee

Conflicts:
	AUTHORS.rst
Merge branch 'kwargs' of https://github.com/bencebeky/emcee
PEP8
Adding Cargile et al.