Feature airport77 attach file to page

Hi Todd,

This is our attach file to page feature. You can revert the change to app/models/page.rb:22 (we had to comment out a line to get the site working in our environment).
Also you'll see a lot of changes in the diff on app/views/pages/_editable_form.html.erb but in reality it's just a small amount of code. It shows more differences because we let RubyMine reformat the entire file. Same with app/views/pages/_show_page.html.erb.
We also added some gems and configured spork in this branch, which you can pull in if you want as well.

Team Airport 77 (Liron Yahdav, Mike Deats, Ryan Lucio)