Increase version numbers for 2.3 ; update languages. #534
Repack and combine. #534
Update README-branch.txt
If coming from the CDN's mathjax/latest address, move to the explicit version (avoids CDN propagation issues when a new version is released).
Repack MathJax.js
Merge pull request #670 from dpvc/cdn-version-append

CDN version append