Update PEP257 to 0.2.4
Update PEP257 to 0.2.4

Change-Id: I126d8fec7a58d74474caa6fde0fc29d247d93994

morucci/pygerrit,dpursehouse/pygerrit,gferon/pygerrit2,markon/pygerrit2,sonyxperiadev/pygerrit,benjiii/pygerrit,dpursehouse/pygerrit2