Important Update:

- FunctionCore/SelectableCore/FileCore/DeviceCore:
  - Remove InputChannels
    - Only OutputChannels -> LinkedChannels
    - Remove PullInput/Output() methods
    - Remove StoredOutput
  - Add References to channels and linked channels
    - Send SourceRef with output
    - Receive TargetRef with input
    - Filter output channels based on TargetRef

SelectableCore.h

@@ -291,7 +291,7 @@ public:
     };
 
     // Function Interface
-    virtual int  Input( const char * ChannelName, const char * Buffer, int BufLen = -1 );
+    virtual int  Input( const char * ChannelName, const char * SourceRef, const char * Data, int Len = -1 );
     virtual int  OutputHandle( THandle * Handle, const char * Data, int Len );
     virtual bool Process();
 };