switching readme to rst
switching readme to rst

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