implement dart:mirrors

[vsmenon]

Implement the dart:mirrors API. We should be able to map this to our dynamic invocation code / metadata.

[vsmenon]

The basic parts of this (i.e., the parts used by angular) are landed. This is still missing a lot of features - general method / function mirrors, parameter names, etc.

[vsmenon]

Angular is now using parameter annotations as well (only for constructors).

[jmesserly]

Angular is now using parameter annotations as well (only for constructors).

should be easy to implement now, given that we track parameter types?

[vsmenon]

Yeah, we've already got code for class-level annotations too, mainly we just need to decide how we want to encode it.

[vsmenon]

Angular is now using ClassMirror.owner:

https://api.dartlang.org/1.13.0/dart-mirrors/DeclarationMirror/owner.html

This will require us to embed a pointer in classes back to the containing library in generated code.