gPorts connect component interfaces in a data-flow-like way

Needs to work for tightly coupled and dist. objects
- tightly coupled for performance
  - allow overhead approx. a virtual function call
- transparently marshal args and return values
  - transparency over various networks and environments

gPorts is intended to provide a more efficient and scalable component connection mechanism
- Input/Output gPorts can call each other explicitly and directly.

Needs to work for tightly coupled and dist. objects