Make it possible to enable katex and mathjax globally in config.toml (#241)

KK

26.30.2019 9ca430610e37fd7248d68bf43cb667fdd6f2912c

Make it possible to enable katex and mathjax globally in config.toml (#241)

* Add \\( and \\[ as mathjax delimiters

* Make it possible to enable katex and mathjax globally in config.toml

 exampleSite/content/posts/render-latex-using-katex.md

@@ -14,6 +14,8 @@
+++
```

If you want to enable KaTeX or MathJax for all post, add `katex = ture` or `math = true` in `config.toml` in `[params]` section.

It's almost a dropin alternative to the mathjax solution,you should just choose one of them.  

Inline math looks like this  

 layouts/partials/posts/math.html

@@ -1,4 +1,4 @@
{{- if .Params.math -}}
{{- if or (.Params.math) (.Site.Params.math) -}}
  <script src="https://polyfill.io/v3/polyfill.min.js?features=es6"></script>
  <script type="text/javascript" async src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js"></script>
  <script src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/startup.js" id="MathJax-script"></script>
@@ -17,7 +17,7 @@
    };
  </script>
{{- end -}}
{{- if .Params.katex -}}
{{- if or (.Params.katex) (.Site.Params.katex) -}}
  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/katex@0.10.1/dist/katex.min.css" integrity="sha384-dbVIfZGuN1Yq7/1Ocstc1lUEm+AT+/rCkibIcC/OmWo5f0EA48Vf8CytHzGrSwbQ" crossorigin="anonymous">
  <script defer src="https://cdn.jsdelivr.net/npm/katex@0.10.1/dist/katex.min.js" integrity="sha384-2BKqo+exmr9su6dir+qCw08N2ZKRucY4PrGQPPWU1A7FtlCGjmEGFqXCv5nyM5Ij" crossorigin="anonymous"></script>
  <script defer src="https://cdn.jsdelivr.net/npm/katex@0.10.1/dist/contrib/auto-render.min.js" integrity="sha384-kWPLUVMOks5AQFrykwIup5lo0m3iMkkHrD0uJ4H5cjeGihAutqP0yW0J6dpFiVkI" crossorigin="anonymous"