* Add chemfig package
Somhow forgot it in chemical equation commit 8004497b
* Change links colors to codeblue
Closes https://github.com/hendricius/the-sourdough-framework/issues/142
* Use KOMA-Script and twosided printing
Because it looks better. Also gets rid of headers/footers on empty
pages
* Fix tex4ebook and komascript clash
See https://github.com/michal-h21/tex4ebook/issues/110
* Factor out packages into a sty file
Separates style details out of the main file, now that we start having
more and more style-related settings.
* Remove parskip
Not needed with Koma-script
* Remove tocloft package
Not needed with koma-script
* Use tocbasics instead of floats
to please kpmascript internal algorithm
* Add a bit more breathing space in ToC
so they are not stuck together at 11.11 onwards...
