Adding EOE function calls and an eoe example

[Zob314]

Adding EOE function calls.
Also adding EOE example that creates a virtual network of EOE devices.
Virtual network example only works on Linux because there aren't any OS-independent virtual network interfaces.

Virtual switch code was shamelessly taken from here

[bnjmnp]

Hi @Zob314, thank you for sharing your addition. This is very substantial. I will probably need more time to dig trough it and I want to figure out how to test it on my side.

[Zob314]

That's fine, take your time. I'd recommend double checking the ntohl calls in eoe_set_ip

ipsettings.ip.addr = ntohl(ipAddr._ip)

I'm developing my own subdevice alongside this and was able to get it working with the ntohl on the controller or device side and I'm not sure which is 'correct'.