Updating application URL to point to wufoo rather than google docs.

This pull request updates the website with a link to the new application form (on Wufoo) rather than the old always-broken one on Google Docs.

The free Wufoo plan only allows 10 questions per form, so I merged a few of these. They should cover all of the necessary points still.

I'd like one or two other members to review this change, and since it affects membership, we probably should bring it up at the next meeting. Since it fixes a broken membership process, though, I'd also be okay with this change going public ASAP. To make this change live on the website, simply merge this pull request from new_application_form into the master branch. GitHub will handle the rest. At that point, it'll be safe to remove this feature branch.