Removes need for user to indicate wifi interface, resets MAC to default

The wservice attribute determines whether or not the system calls the wireless interface "Wi-Fi" or "Airport", then sets the wifi attribute with the matching interface (en0, en1, etc).

The WirelessMAC attribute is filled with the machine's default MAC address, which is then reset at the end of the program's run.
Merge pull request #1 from imariaprime/patch-1

Removes need for user to indicate wifi interface, resets MAC to default