Updated readme

[bes89]

added bower install highlightjs and used ---save parameter when installing packages

[pc035860]

There's no --save nor --save-dev presented at https://github.com/angular-ui/ui-router/blob/master/README.md#get-started.
I believe they meant to let the user to decide whether to add it or not?

[bes89]

Whats wrong with --save? it just adds the new dependency to your package.json/bower.json.
Sure, you can add it manually....

[ethanhann]

Installing highlightjs separately wouldn't be necessary if it is listed in angular-highlightjs's bower.json file as a dependency.

[pc035860]

@ethanhann Actually, the highlight.js dependency was removed from bower.json due to #28 .

[ethanhann]

Ah, I understand the situation. Dependencies can be overridden in bower.json anyway, which is handy for allowing tools like wiredep to work, so it isn't a big deal.