Redid class Rewrite, add Rewrite in admin's control

- Add more logic to class
- Variable link's base
- Little word's fixies in admin's pages
Sort *.html files in styles
Add OS X launcher download button

- Little changes in MetroBlue theme
- Update start_game.html
Merge pull request #52 from upisfree/master

Redid class Rewrite, add Rewrite in admin's control, sorting files in styles, OS X launcher dowload button