doc: update README with examples
doc: update README with examples

Signed-off-by: Noah Watkins <86ecd7d1c53cf33a85014f7cab78876cb4491020@gmail.com>

ceph/go-ceph,theanalyst/go-ceph,AcalephStorage/go-ceph,theanalyst/go-ceph,webfd/go-ceph,ceph/go-ceph,noahdesu/go-ceph,AcalephStorage/go-ceph,noahdesu/go-ceph,webfd/go-ceph,ceph/go-ceph