Slight change in the EFIS & EIS Arduino adapter.

I removed the header for the ENC28J60 Ethernet adapter, and opted for a W5100 Ethernet shield;  since this is only a prototype.  If the design proves successful, all features will be implemented into a single board.  

The prototype as of now consist of the adapter pictured above, an Arduino Mega 2560, then a W5100 Ethernet all stacked atop one another .