adding IPython parallel example
adding IPython parallel example

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