Refactor JS postprocessors
Update highlighjs version to 8.0
Run post-processing scripts on preview HTML
Rerun MathJax after updating preview
Do not load Reveal.js when preview
Upgrade CodeMirror
Use better class names
Merge branch 'master' into modular-js
Minor tweak
Update jquery version
Do not run main.js automatically
Add support for LongText
Merge branch 'modular-js'