Add non-first-class object-messaging capabilities

[TheRealMichaelWang]

While it would be somewhat difficult to create object message receivers that fully support the capabilities of a first-class function, a good first step would be to implement simple object messaging capabilities that don't need first class support - for example operator overloads and constructors, which can be overloaded with different parameters and return types, are good candidates to support.

[TheRealMichaelWang]

While closure like functions may be added later, operator overloads, constructors, and destructors will be implemented as object message receivers without first class function capabilities.