Use standard facilities or reference external dependencies used in the examples

[thenikso]

Just adopted this guide on a new project and digging it. Here are some things that slowed me in the adoption (with opinion on how to change them):

• Not being used to $stateProvider (from ui-route I believe) I'd expect it to be replaced by $routeProvider or a reference to be provided
• The use of UnderscoreJS should be avoided as it implies a dependency or a reference be provided
• A ES6 module transpiler to IE5 should be suggested (or a list of production ready one provided)

[feelepxyz]

@thenikso good points! We'll add a section on our tooling setup and external deps later today.