* Update links to use https://coffeescript.org
* 2.3.1 changelog
* Bump version to 2.3.1; update output
* Forgot one
* Another one
* Lock Babel versions for Node 6 build to succeed, until Babel 7 is out
* Changelog sub-sections should use h3, not h2; no need for hack anchor tag anymore
* Internationalize dates to user’s locale
* Consistent names
* Split up the changelog into separate files per version; make HTML markup consistent with the other sections in the docs
* Fix sidebar links for introduction and overview
