* Add Twitter Cards to each page
Hugo has an internal template for [Twitter Cards](https://gohugo.io/templates/internal/#twitter-cards). It takes necessary information from either site's or post's config thus it makes sense to add it to each page.
* Add 'description' to posts archetype
This optional field is used by Twitter Cards.
* Add example usage of Twitter Cards
* Add artspb to contributors
* MathJax support
There was no support for displaying math written in Latex. This is now added with the help of MathJax.
MathJax uses an external Javascript file and as not to add unnecessary load the support for math is only enabled if the 'math' param is set to true.
* MathJax support
There was no support for displaying math written in Latex. This is now added with the help of MathJax.
MathJax uses an external Javascript file and as not to add unnecessary load the support for math is only enabled if the 'math' param is set to true.
* Auto stash before merge of "math" and "origin/math"
* Delete unnecessary option
* Actually enable math for demo page
* Have demo page be consistent
Artem Khvastunov
Vlad Ionescu
Luiz F. A. de Prá