Fixed some makefile and set default BOARD to JAWBREAKER (instead of JELLYBEAN).
Modified firmware and host tools for portability Linux/Mingw, added fw rffc5071 & host hackrf_rffc5071 example.
Added readme to build host tools for Cygwin/Mingw & Linux.
Merge pull request #30 from TitanMKD/master

HackRF host tools update Cygwin/Mingw/Linux and added rffc5071 tool