Log Message:
(ham/uhd) Updated to 3.15.0.0

## 003.015.000.000
* N320: Fix MCR initialization, fix checks for LO distribution board,
  reset RX IQ balance on init, replace DRAM FIFO with replay block,
  improve constraints, fix I/Q imbalance compensation, add FPGPIO control
* N310: increase default dc offset averaging window, make tunes
  asynchronous, add capability to control RF filter bypass and freq.band
  limits, fix setting user DB EEPROM, correctly report N321 vs N320,
  improve DDR3 BIST, update max revision to 7, fix DMA arbitration to
  use contiguous packets, replace DRAM FIFO with replay block, fix SFP
  link up status, add workaround for clocking interference with external
  reference clocks, disable gpsdo clock/time source options when
  enable_gps=0
* X300: Fix max bitfile size, fix GPIO ATR property access type, heavily
  refactor, introduce conn_mgr, add DPDK support, add
  capability to flash NI-2974 FPGA, fix clocking code, enable 11.52 MHz
  and 23.04 MHz system ref rates, improve usage of constrained device
  args, enable ADC gain through RFNoC API, add mode to set master clock
  rate to arbitrary values between 184.32 and 200 MHz, throttle
  muxed_zero_copy_if
* E320: Fix time source clobbering ref source, add support for RevE, fix
  reporting of FPGA version hash, fix SFP link up status, fix missing
  ce_clk driver
* E310: Convert to MPM architecture, fix uhd_image_loader usage, fix DMA
  arbitration to use contiguous packets, reduced DMA chans to 4 (using
  data stream muxing), fix DRAM_TEST target build
* E3xx: Correct frontend name in devtest
* B200: Add command to query bootloader status, fix sc12 streaming, fix
  FIFO sizes on GPIFII interface
* UBX: add temperature compensation mode
* SBX: Only update ATRs when lock state changes
* TwinRX: add LO charge pump properties, increase default charge pump
  value on LO1, add low spur tuning mode, fix duplicate write to N value
  in DDC
* RFNoC/device3: Read command FIFO size from device instead of
  hardcoding values, fix multidevice graph connections, ENABLE_RFNOC now
  defaults to ON, search all nodes for tick rate, add update_graph()
  call which lets blocks do a graph-wide update of properties, fix
  missing port arg in SR_WRITE Noc-Script call, constrain
  send/recv_frame_size baed on MTU, fix flushing on init/deinit, disable
  FC ACKs for lossless links
* RFNOC/FPGA: Fix rb_stb in split stream block, fix off-by-one error in
  the window block, fix phase reset and -accumulator for DDC and DUC
  blocks, fix flushing on split-stream block, fix DC offset issue with
  DDS by using proper rounding, fix DUC/DDC sample rate switching by
  latching N on M in axi_rate_change, various fixes to
  uhd_image_builder, fix MTU settings in blocks, align byte count to
  8-byte word
* RFNOC: Allow UHD_RFNOC_DIR to contain multiple paths
* Python API: Replace Boost.Python with PyBind11, fix benchmark_rate
  statistics, fix phase alignment test script
* Python API: Added include of complex.h to allow pybind to convert
  complex data types
* Python API: Make multi_usrp::get_*_usrp_info() return a Python dict
* Python API: Fix array processing in send_waveforms()
* UHD: Allow ignoring fallthrough warnings, reduce Boost footprint,
  remove gpsd dependency, improve streaming, reduced the number of
  compiler warnings, introduce pop() to the prop tree, add typecast
  operator from uhd::dict<> to std::map<>, properly cache config file
  data
* MPM/mpmd: Introduce compatible rev numbers to support future hardware,
  fix some resource leaks in mpmd, fix spurious reclaims causing
  unnecessary warnings, fix resource leaks in liberio xport, allow to
  mux data streams over liberio transports (e.g. to require fewer DMA
  channels on E310), wait for DPDK links to come up before proceeding,
  relax failure handling when updating components (fixes spurious errors
  when updating FPGA images over SFP), fix issue where RPC
  initialization would hang on failure
* MPM:  Re-enable RPC server timeouts after components have been updated
* MPMD: Remove arbitraty frame size defaults for UDP transports
* MPMD: Fix incorrect link rate warnings
* FPGA: Use new device-tree overlay syntax, upgraded to Vivado 2018.3,
  broke various paths with critical timing, allow SystemVerilog source
  files, improve viv_modify_bd and viv_modify_tcl_bd, fix resets on 2clk
  FIFOs
* USB: Allow cancelled USB requests to occur
* USB: Fix global session race condition
* Logging: Always honour log level, don't log colours for non-ttys, fix
  includes, demote various log messages, fix logging colours, fix
  deadlock on Windows machines
* Examples: Fix benchmark_rate INIT_DELAY, fix memory leak in
  tx_samples_c
* Examples: Remove thread priority elevation
* Examples: Add options to benchmark_rate for start delays and priority
* Tests: Make the Python interpreter for devtests a parameter, add unit
  tests to MPM
* Utilities: Fix converter benchmark for Py3k and scaling issue
* Tools: Fix kitchen_sink
* Tools: Fix Wireshark dissectors to work with WS1, 2, and 3
* Tools: Various fixes to FPGA functional verification tests
* Docs: Various fixes, fix Doxygen warnings, fix links to KB, update
  DPDK information about building libraries, add DPDK subsection about
  thread priorities, update testing procedures
* C API: Add uhd_get_abi_string, uhd_get_version_string
* CMake: Make manpage compression optional, allow setting of PKG_DOC_DIR
  from the CMake commandline, add replay example, fix missing 'project',
  replace ENABLE_PYTHON3 with a simpler Python detection, clean up
  superfluous modules, improve log statements, bump dependency min
  versions, add MPM unit testing, fix missing BIGOBJ for MSVC, add our
  own UHDBoost.cmake to better find Boost across versions and systems,
  constrain DPDK check to exact version
* Formatting: Apply clang-format to all files, break after template<>