fix markdown syntax, add example architecture diag
fix markdown syntax, add example architecture diag

Signed-off-by: Ryan Wallner <e42968b5e20ba2fb2af29ddce81be9a5498ad295@emc.com>

Azulinho/vagrant-scaleio-flocker,emccorp/vagrant-scaleio-flocker,emccorp/vagrant-scaleio-flocker