Added support for TLV64, fixed decode function to support TLV64

Decoding TLV64 now looks like the following:

Main
{
  ------

	CMTSStaticMulticastSessionEncodings
	{
		CMTSStaticMulticastSessionGroup 239.255.1.4;
		CMTSStaticMulticastSessionCMIM 0xc7ff;
	}
	CMTSStaticMulticastSessionEncodings
	{
		CMTSStaticMulticastSessionGroup 239.255.0.1;
		CMTSStaticMulticastSessionCMIM 0x47ff;
	}
	/* CmMic 7b6eee986bf342cfe5986391a4bf41cb; */
	/* CmtsMic 63136f41c893ef461c4c9e00e5dc1bed; */
	/*EndOfDataMkr*/
}