DOC: Web-site release notes, and some updates on front page.
DOC: Past announcements.
DOC: A bit more old news.
DOC: update .mailmap.
DOC:  Mailmap, copyright, Authors.
DOC: Being a bit more realistic and modest.
Merge pull request #522 from arokem/docs-for-release

DOC: Web-site release notes, and some updates on front page.