Update code for default server.js so no warning are displayed

When running with a newest express module, this
message is shown :

  Warning: express.createServer() is deprecated, express
  applications no longer inherit from http.Server,
  please use:

    var express = require("express");
    var app = express();
Initial work
Updated date helpers
Add a stack overflow link helper
Merge with master, _account moved to origin-server
Merge remote-tracking branch 'origin/master' into aria_dashboard
Creating an authorization should take the user to the show page for the token
Cache that the user has no keys
Use credit card format closer to card value
Support redirection back to the settings page
Fixing test cases
Merge remote-tracking branch 'origin/master' into aria_dashboard
Support cache config
Update tests
Merge remote-tracking branch 'origin/master' into aria_dashboard
Remove extraneous pry
Tweak graph line height, style table captions
Add billing_date_no_year
Don't assume exceptions have a model
Reformat resource_not_found checking