Changing css for the menu

Changed css for the top menu of the website. 
The menu is now a table, \<li\>'s are the cells inside that are automatically distributed into the whole row.
After this, the logo can be put to the left also.

However, this change probably breaks the mobile version, so that would be needed to be figured out.
BEFORE: 
![BEFORE](http://oi59.tinypic.com/3310o74.jpg "BEFORE")
AFTER:
![AFTER](http://oi57.tinypic.com/dzza6p.jpg "AFTER")