Check wiki page existence server-side

[ryanvarick]

I want to eliminate as much client-side javascript as I can. There's probably a better way to do this, but this was the least invasive change.

[claudioc]

Hi,

mmmh, it's apparently a good idea. I need to take a look at how much it would cost performance wise, though. If I get it right, this change would affect how the page is rendered. My original idea (the idea of the test for the presence of a page being on the client side), is that the user should be able to read the page as soon as possible and have the browser work in background retrieving the informations for the missing links.