Add codepress functionality for syntax highligted css and html editing

[bterkuile]

Editing stylesheets is now done using a textarea. I think it is much better to edit in these in a codepress window. I think it is best implemented in the editcss.php file and maybe as option to edit html in de content->pages section.

Codepress is easily added and can be found at http://codepress.org/

[SimonSchaufi]

implemented in Version 1.1!
then download the editarea module.