Use headings instead of lists
This changes the name for tables from being unordered list items to being actual level 3 headings.
This also adds a "Beispielprogramm" heading to the assembly code.
The current formatting of those things is a bit odd, as the tables are not indented to belong to their names. Instead of indenting the tables I went for using headings as those are more fitting in my opinion and allow for being included in links as opposed to list items.