adding the docs to the README
adding the docs to the README

willvousden/emcee,willvousden/emcee,johnbachman/emcee,johnbachman/emcee,drphilmarshall/emcee,elkingtonmcb/emcee,linan7788626/emcee,joezuntz/emcee,jellis18/emcee3,ga7g08/emcee,dfm/emcee,farr/emcee,dfm/emcee3,ipashchenko/emcee,dfm/emcee,ipashchenko/emcee-x,pkgw/emcee