Add support to Underscore.js and Date.js

[Igor Santos]

Create a folder like "lib" or "vendor", download their files, and require: Date goes in the global scope, while Underscore goes inside an _ var.

[Igor Santos]

• adding various dependencies and organizing licenses in a folder. refs #6

→ <<cset b9f51b1d9b7a>>

[Igor Santos]

• cleaning app.js
• requiring Underscore.js and Date.js
• adding basic switch between login/home screens closes #6

→ <<cset f7c67f73fba0>>

[Igor Santos]

• moving lib files to Resources folder, the right place
• removing Underscore and Date requirements from app.js as it does not work. We will need to require them each time the file is needed. refs #6 ! fixing some stuff on calling the initial window

→ <<cset b1ba9b535b6e>>

[Igor Santos]

Removing milestone: Basic stuff (automated comment)