Improve formatting in the README file
Improve formatting in the README file

- Add a proper title

- Correct capitalisation

- Add missing punctuation

Change-Id: I1edc431c389fedb8750f70f85a4b3eb11385a54e

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