update README.rst (clean up badges)
update README.rst (clean up badges)

yunstanford/sanic,yunstanford/sanic,ashleysommer/sanic,channelcat/sanic,channelcat/sanic,lixxu/sanic,ashleysommer/sanic,yunstanford/sanic,lixxu/sanic,channelcat/sanic,yunstanford/sanic,lixxu/sanic,lixxu/sanic,channelcat/sanic,ashleysommer/sanic