Proper compilation to HTML

[ayberkt]

Something we discussed with @martinescardo a while ago. Making an issue here so that I don't forget about it.

---

Currently, all Agda files in TypeTopology have the .lagda extension. For reasons that I don't really understand, Agda can generate Markdown files only from files with extension .lagda.md. It is possible to generate HTML from .lagda files but this has the problem that the literate parts of the code are treated as code (i.e. are not wrapped in <p></p> tags) so it's not possible to make the formatting nice by adding a CSS file.

It seems that the best way to fix this is by converting .lagda files to .lagda.md files (in fact @martinescardo already wrote a script for this if I recall correctly). It would be great to make the HTML files generated from TypeTopology nicer by doing this and compiling through a Markdown processor.