Change of template

I moved to a richer Hugo template, partly to move things around under the hood, but importantly it gives a sounder platform for the future.

However, it took many hours of frustration to get blogdown and the template to nicely render $LATEX$ formulas. In the end, it was very simple, although no documentation or blog posts helped: the mathjax: true YAML header option needs to be changed to math: true. No need to alternate between .Rmd or .md or .Rmarkdown files, mess around with config.toml or params.toml, chase down unknown pandoc binaries or add new partials snippets.

In addition, I finally figured out how to automatically generate table of contents. Insert the following snippet in the file header: