Rename hello_world_small.c to lms_spi_controller.c
lms_spi_controller: Remove inaccurate header comment
Added note in root level for bladeRF-flash and documentation for bladeRF-flash
Update README.md
Change default flash tool to bladeRF-flash
Added link to forum post of forcing DFU mode
Added bladeRF-flash to TOC
utilities: add an alternate method of determining the installed libusbx version

Sometimes check_function_exists does not work on Windows, it is then worth
testing to see if the LIBUSBX_API_VERSION is equal or greater than 0x01000102
(1.0.16). This version contains the neccessary libusb hotplug features needed to
make bladeRF-flash work.
[FX3] When in FPGA load and RF mode, transitions to U1/U2 should be rejected
[libbladeRF] Fixed double interface 1 set and fixed return code issues in lusb_load_fpga