added get_ip()

[peterpalfi]

[ebolisa]

@peterpalfi Why not get that info directly from the main.py code?

...
# Main Code goes here, wlan is a working network.WLAN(STA_IF) instance.
print("ESP OK")

print(wlan.ifconfig())
print('IP', wlan.ifconfig()[0])
print('RSSI', wlan.status('rssi'))