Ship 4.0a5

Prepare for 4.0a4

An official 4.0a3

Note some things that need to be done

Fix the release date

New sample HTML for 3.7.1

Don't make windows kits for 3.1 any more.

Updated sample HTML report.

Preparing for 3.6b3

Automated merge with ssh://bitbucket.org/ned/coveragepy