Account for anonymized MAC addresses

[boveus]

It’s quite ironic that any device which anonymizes probe requests actually informs you that they do it — in anonymized devices, the locally addressed bit (second-least significant bit) of the address is set to 1. Therefore, running a simple SQL query lets us know that nearly 25% of devices anonymize MAC addresses (891,131 / 3,570,048 probe requests collected).

[boveus]

Some MAC addresses have been anonymized by the cell phone manufacturer. These should be ignored or there should be an 'anonymized' boolean available on the device itself.