* update changelog
* add blog post
* update reference
* update download page
* update version in config.yml
* update announcement
* point reference.html to 1.3.1 docs
Also add reference-1.3.1.html, which redirects to 1.3.0 docs
* update integrity hashes
* redirect reference.html directly to 1.3.0 to avoid double redirect
* Add documentation on how to do a release
* Preliminary changelog for next release
* Preliminary blog post
* Modify version to 1.2.0
* Update changelog
* Add 1.2.0 reference
* Point to 1.2.0 docs
* Update hashes and latest version
* Update latest news
* Add 1.2.0 release date
