Tweaked an error message.
Add some more documentation comments.
Some roughed in code around setting up the USB device separately from configuring the radio.
Add some print statements for debugging
Another crack at enums for DataRate and Power.

Also, renamed a few methods and added BigInt support for Addresses, along with range requirements for the address value.
Started in on sendVendorRequest.

For now, this is just serving as a general purpose testing spot.