Update app.js

Migrate from express 3.x to express 4.x
Update package.json

Migrating Express from 3.x to 4.x
Update/Migrate express from 3.x to 4.x
Update README.md
Update README.md
Remove in1.com link from menu
Update app.del to app.delete
Merge pull request #10 from bcultura/master

Migrate from express 3.x to 4.x