Merge branch 'better-content-renderer' into 'master'

.gitmodules

Makefile

docs/Makefile

docs/content.json

docs/content.md

docs/gen_content.py

fgs/Makefile

fgs/page.py

fgs/pandoc.py

fgs/pandoc_toc.html

fgs/reader.py

lang.json

mathjax

theme/old-templates/article.html

theme/old-templates/base.html

theme/old-templates/category.html

theme/old-templates/index.html

theme/old-templates/macros/README.md

theme/old-templates/macros/cards.html

theme/old-templates/macros/getters.html