Merge pull request #5 from lumius/master

several features adding and fixing one bug

- Added basic theming support
- Wrote a workaround for a problem between url rewriting and folder structures.
- Created a dependency on parsedown.
Prettified some code and made some data editable from the config.ini
Changes for theming preparation

fixes:
* replaced # with ; because it's depricated for a long time (how dare you Corstian Boerman ;) you did all others correct... )

theme edits:
* Edited menu.php so that the - is now styling in style.css because it's only styling, not content
* theme/default/posts.php and placed it back in app/pages/posts.php because of it's almost only logic and not necessary for theming
* theming.php for including includes like includes/disqus.php what is a feature in place of theme specific