Codechange: Rename ZusiTcpConn to ZusiTcpClientConnection

Rename ZusiTcpConn to ZusiTcpClientConnection.
Introduce "new" ZusiTcpConn class that inherits from the renamed class.
Mark old class name obsolete with reference to new one.
Cleanup: Make VB.Net examples use the new class name
Fix: Add instruction and ID bytes to bytesRead
Aux: Set assembly version to v1.2