Remove some navigation buttons

[nhandler]

The 'Freenode Main Page' button takes the user to a page that feels completely different from the GMS. Since it already links to specific freenode.net pages in the relevant places, we can probably do without this button (or it could be moved to a link in the footer out of the way).

Likewise, the 'GMS Home' button could probably be replaced by linking the logo in the top bar with a link to the GMS Home (this would avoid having a single button in the top group if you remove the Freenode one).

Finally, the 'Your Contact Info' button could probably be replaced by linking the user's name in the upper corner with a link to this page.