Add support for multiple inheritance to the procedureal exception system.

[Sqeaky]

A game dev shouldn't be forced to catch both std::exception and Mezzanine::Exception::OutOfRange. We want to retain the benefits of having simple exceptions and a build system list of exceptions.

This should be easy to implement by changing AddJagatiException to accept a single item or a list. If it is passed a list then some simple manipulation should be able to split the list then write correct parameter lists and inheritance line.