Mindscape.Raygun4Net 4.0.0

* Moved MVC and WebApi support out of this package into their own packages to resolve dependency issues. (If you need MVC or WebApi support, see the Raygun4Net.Mvc or/and Raygun4Net.WebApi packages). * Removed redundant and unused message properties. * Wrapper exception list is no longer static to resolve a potential threading issue. * Resolved an issue sending exceptions on older versions of Android. (API level 8). * Message builder logic has been moved out of the message objects into separate builder classes. Keep this in mind if you instantiate your own Raygun message objects entirely from scratch - you may want to use the builder classes to perform the default value population.