Promote Integer and GenerateIntegerSequence into the real codebase.
Promote Replicate into the real codebase.
Promote RubyProcFilter into the real codebase.
Promote FileOutput into the real codebase.
Fix issue where PortCollection[nil] double-yields collections.
Move output version of send_message down to OutputPort.
Add a connection that will forward messages to another component's output port.
Add a connection that will forward messages to another component's input port.