Support multiple registration for a single type

[JoeRobich]

Problem:

I have multiple types of ITask that I would like to register with the factory and retrieve all at once later when displaying them to the user.

Suggestion:

Multi-register types for an interface

 // Standard
 factory.register(NaiveStrategy, IStrategy, NaiveStrategy, false);
 factory.register(ExpertStrategy, IStrategy, ExpertStrategy, false);
 var strategies:Array = factory.resolveAll(IStrategy);

 // Fluent
 factory.register(NaiveStrategy).forType(IStrategy);
 factory.register(ExpertStrategy).forType(IStrategy);
 var strategies:Array = factory.resolveAll(IStrategy);

Since we make multiple registrations for a type by changing scope, provide a method for resolving a type from all scopes. Make it easy to create these registrations in the Fluent interface by adding a forType to complement asType. forType will set the scope name based on the registered instance.

[JoeRobich]

First spike of the functionality. Looking for comment. Still need to write tests.

[JoeRobich]

Added minimal tests around new functionality.

[druttka]

Seems legit. I don't have an ActionScript environment right now, so I won't be pulling this and running the tests, etc. If the tests are passing and it enables your use case, merge at will =)