#359 - no longer requiring Now when raising events

Fixes #359.

Includes functionality that had been discussed as an add-on to #30 (and will enable changes for that issue).
I think it's correct as is. The short syntax (without `AddressOf`) took `Go`, not `Now`:
https://github.com/FakeItEasy/FakeItEasy/wiki/Raising-Events#vbnet
Of course, maybe I'm _still_ reading it wrong.