libbladeRF: Version bumped to v0.16.0

Changes include:

- Added XB-200 support
- Added experimental DC calibration and DC calibration table support
- Added "software autoload" of FPGAs and DC cal tables from config directories
- Added "File not found" (BLADERF_ERR_NO_FILE) return code
- Allow tuning up to 3.8GHz
- Fixed incorrect version checks
    + This resolves issue where VCTCXO value isn't loaded when using FPGA v0.0.3
- Fixed intermittent FPGA load failures