Convert all tabs to spaces.
Remove insignificant trailing whitespace
Upgrade all dependencies to latest versions

Also:
 - remove unused/duplicate dependencies.
 - rename `server.express` to `server.app` for more consistency with
   convention
 - add myself to package.json "contributors"
 - a little more whitespace adjustment
Merge pull request #282 from drewww/pedantry

Pedantry