GNSS-SDR v0.0.6

This release has several improvements and bug fixes:

• Added initial support to multi-band, multi-source configurations (multiple signal sources and signal conditioners).
• Updated configuration files to new notation. Old and new configuration notations still compatible.
• Added skeleton for mixed (multi-frequency and multi-system) observables block.
• Faster local carrier update (25% of improvement).
• Added initial support to GPS L2C real time tracking and decoding of CNAV message with NSL STEREO v2, Fraunhofer’s Flexiband, and USRPx front-ends (the latter requiring external clock).
• Added initial support to select the frontend clock reference source in UHD signal source (i.e. internal or external clock reference).
• Added 2 bits complex file source for GNSS-SDR GSoC 2015 signal sampler designed by Ajith Peter.
• Added a new rtl_tcp signal source, remote access to RTL2832U-based dongles via TCP.
• Always build front-end-cal, a calibration tool for some DVB-T receivers based on the Realtek's RTL2832U chipset.
• Fixed bug in UTC time computation for GPS signals.
• Updated satellite identification for GPS and Galileo.
• Defined ‘cbyte’ as a new input data type (std::complex)
• Adding a new data_type_adapter, from interleaved short to std::complex
• Adding a filter for complex short streams.
• Adding a fir_filter for std::complex (aka cbyte). It converts the data type to floats, filters, and converts back to cbyte.
• Added a resampler for cbytes and cshorts.
• First working version of a GPS tracking block implementation using CUDA with multi-GPU device support.
• Updating RINEX obs header when leap second is available.
• Updating RINEX nav file when IONO and UTC data are available.
• Include Signal Strength Indicator in RINEX observable files.
• Tests fixed.
• Fixed more than 200 code defects detected by Coverity Scan.
• Updated documentation.
• Updated documentation and CMake scripts for the GN3S v2 driver (Linux-only)
• Armadillo version automatically downloaded and built if it is not present in the system is now 5.400.3.
• Updated old links from googlecode to new links at GitHub for Google Test, gflags, glog and gperftools.
• gfortran is no longer a required package, but it is used if available.
• Added an option to remove logging.
• Enabled cross-compilation for ARM devices.
• Lots of code cleaning.