Slightly cleanup NEWS
Slightly cleanup NEWS

- Move issue numbers to summary line for NEWS entries
- Add a period at the end of an entry

pfmoore/pip,rouge8/pip,xavfernandez/pip,sbidoul/pip,pradyunsg/pip,rouge8/pip,xavfernandez/pip,techtonik/pip,pradyunsg/pip,techtonik/pip,sbidoul/pip,pypa/pip,pypa/pip,pfmoore/pip,techtonik/pip,rouge8/pip,xavfernandez/pip