Make the web more responsive

So, here is a first iteration with the related issue #69.

I'm uploading right now so you can test it and tell me your opinions.

I hided the menu in <480px resolutions.
I think is only noise in the mobiles.

I've broke the menu so now it does not scroll down with the page. I need to fix it :)
Menu buttons in the "servers" section can be improved. I think is just a matter of lowering the font size.

I've ested it un nexus5 iphone5 and nexus10 resolutions. Also some bigger random resolutions. From 900px to 1700px.

So, for now this PR is not ready for merge. I just want to get some feedback about it :)