docs(guide/Running in Production): ng-strict-di

Adding note about Strict DI mode.
I've built countless apps in angular using ng-annotate. When you say they don't do a very good job, I'm a little lost... It works really well... Especially since the alternative is to either explicitly annotate yourself (just realized I was using the opposite word for what I meant, this should say "automate the explicit annotation" I'll fix that...)

Also, strict-di mode is more than a debugging tool. It encourages (enforces) explicit annotation which does have pretty significant performance gains over implicit (see [jsperf](http://jsperf.com/angular-annotation-variants)) so I think it's good to encourage the use of it in production.

I'm going to make some wording corrections, but I definitely feel like this is something that we should be recommending for use in production...