Support for MATLAB OOP

[bbarker]

MATLAB supports OOP through an internal system as well as interaction with the JVM. I'm not considering the second case (JVM) in this issue. And as far as I can tell, haskell-matlab doesn't currently support this (but see mObjectGetClass, mObjectSetClass). I'm not sure how useful it is either to model certain aspects of OOP, like inheritance, but we could possibly do this with typeclasses.

Some useful reading to start with:

• Passing a user-defined class to MEX
• OOP in Haskell