Added jQuery File Upload plugin for ajax uploads

Added new template block for adding scripts to specific pages.
Initialized file upload plugin with basic settings. The backend
for uploads is not implemented yet.
File upload processing and removed jQ file upload

Added basic multipart file upload handler. I opted to split up
the default body parsing middleware included in express in order to
use formidable seperately as needed. As far as I can tell, this
gives more flexibility since formidable is only needed for handling
file uploads (we have node-validator for checking other forms), and
using it seperately from express.bodyParser gives us better access
to events related to the upload.

Note that express.bodyParser is simply a wrapper that includes
express.json, express.urlencoded, and express.multipart (formidable).

I also removed the jQuery File Upload plugin as I could not get it
to work without adding an extra dependancy to jQuery UI. I plan on
replacing it with an AJAX uploader with fewer dependancies.