MathJax v2.7.0

MathJax v2.7.0 focuses on bug fixes and provides opt-ins into several new features.

For more information see

• the release milestone for more information.
• http://docs.mathjax.org/en/latest/whats-new-2.7.html
• https://www.mathjax.org/mathjax-v2-7-now-available/