Delegates

[lemonmojo]

• [x] Memory leak
• [x] Get a delegate from managed code (DefaultAnimalCreator), pass it to native code and back again to managed, then invoke it from managed
• [x] Bonus points for being able to directly invoke it from native code
• [x] To enable this we'll need to be able to create trampolines for both directions (native <-> managed)
• [x] Methods with multiple delegate parameters
• [ ] Nested delegates (is that even possible?!)
• [x] Property setter with delegate type
• [x] Property getter/Method that returns a delegate
• [ ] Add tests for System APIs that work with delegates
• [x] Invoke method should have try/catch + exception parameter