Merge pull request #50 from TitanMKD/master

New license BSD 3-Clause License for libhackrf and moved examples to hackrf-tools
Merge pull request #51 from TitanMKD/master

Updated cmake script to find libhackrf, updated hackrf (host&firmware) frequency range from 5MHz to 6800MHz
renamed usb_performance to hackrf_usb
moved cpld stuff out of hardware/jellybean where people would be unlikely to look for it