### Angular application directory structure 

Leverages [Angular UI Router](https://github.com/angular-ui/ui-router) instead of core `ngRoute` module. `UI Router` allows
us to organize our application interface into a [state machine](https://en.wikipedia.org/wiki/Finite-state_machine).
Unlike the `$route` service in the Angular `ngRoute` module, which is organized around URL routes, UI-Router 
is organized around [states](https://github.com/angular-ui/ui-router/wiki), which may optionally have routes, as well as other behavior, attached.

LIFT* Organization principle:
* **L** - Locating code easy
* **I** - Identify code at a glance
* **F** - Flat structure as long as we can
* **T** - Try to stay DRY

___
*_The term was originially coined by John Papa._