Fix invalid html code

Open an ul (without any li inside) but close a div?
Not correct! :p

Remove an invalid comma

Certainly a typo.
Fix invalid html code in about

Auto closing spans are not a valid syntax.
By the way, I didn't really get why this was needed. To link directly to this part of the page? Did not see any link to do that.

I move the id to the following div at the moment, but I think this can be remove every there is no link to it.
Fix regression introduced by #26: title hidden by header

Change margin to padding to avoid hide the title
fix hidden title on index page too
Merge branch 'Flaburgan-patch-3'