Update contributors script to count by date.
Contrib script now shows PRs and merges.
Update 0.9 release notes with new features.
Update versions for 0.9.0 release.
Update version in docs.
Correctly determine version number from module.
Fix markup error in marching cubes docs.
Update gh-pages instructions in RELEASE.txt.
Mark BRIEF and Censure as experimental in release notes.
Update docversions correctly for 0.9.x.