Add support for custom delegates with MSpec
MSpec supports Custom delegates.
Currently NCrunch seems hardcoded to "It", it would be great to support also custom delegates annotated with the AssertDelegate-Attribute
This is particularly important for usage in conjunction with Moq, because it also contains a class named It.
note that it is possible to work around the issue with aliases in the using statements, yet it is not a very convenient way to do so, because of the "discoverability" of the workaround.