Updated to support the new May 15th firmware. Also took the opportunity to make a few tweaks, including presenting the button tables in a more standard "ABXYLR" order, regardless of the byte-order in the actual SF2000 data files
Seems like there may be some more significant changes to the data format for the button mappings; I haven't had time to dive into the details yet, so just updating the tool to indicate it knows about the new firmware, but doesn't support it yet
