NSubstitute auto default values from fixture (fixes #297)

The solution is similar to what @dcastro did for AutoMoq on #302, but for NSubstitute.

There are a few differences, though:
It works with ref parameters
It won't setup void methods due to a limitation in NSubstitute that does not allow to override When..Do setups

Notes:
I had to late bind the NSubstitute methods because the signature of Returns and ReturnsForAnyArgs methods has changed a few times since 1.4.3 (had optional parameters added and return type changed). 
I added the classes that late binds the methods to the AutoFixture kernel as I though it might be helpful for someone else.

```LateBindingStaticMethodQuery```: Selects public static methods that has the same parameters of another method, ignoring optional parameters and return type.
```LateBoundMethod```: Decorates another method invoking it supplying missing optional parameters.
```GenericMethod```: Encapsulates a generic method, inferring the type parameters bases on invocation arguments.


`TemplateStaticMethodQuery` sounds like the best of those candidates. However, I'm wondering if it would be possible to turn this into a `TemplateMethodQuery` that supports both static and instance methods?

As far as I can tell, the constructor doesn't check whether or not the passed-in `template` is a static method or not, so the query could do one of two things:

- select both instance and static methods
- look at `template`, and use binding parameters that corresponds to the template

Wouldn't that make this class more generally useful?