finished 2.3, styles pre/code elements,..

I have finished 2.3, although it could likely do with more proof-reading
and maybe images towards the end (D2 task). I added four images as
evidence for the testing table, however, and they have a Lambourghini in
them.

I also developed index.php further, improving the conversion of relative
links to absolute, for instance. I also added code to process markdown
emphasis inside block level elements, and changed some commenting. I
also properly implemented including of files.

In m.css, I properly styled pre and code tags, and they look well swell.

As for 42.3, I actually made including work, and changed the syntax for
such.

On the documentation, I updated the webserver configuration, changed
some text and improved indentation.