Lsl

* Fixed a bug in the lsl.reader.ldp classes that causes offset() to fail in certain cases

* Updated setup.py to make it more likely that clang will build OpenMP-enabled extensions
* Updated the install documentation to recommend pip
* Added a 4-tap + Hanning windowed polyphase filter bank to the various functions in lsl.correlator.fx
* Added an option to use the new PFB in correlateTBN and correlateTBW
* Added an option to use the new PFB in drxSpectra, tbnSpectra, and tbwSpectra
* Added support for proper motions to the IDF format
* Added support for storing source intentions in the CALCODE field in FITS IDI files
* Modified the offset method in lsl.reader.ldp to take into account the frame buffers
* Added support to the lsl.reader.ldp.DRSpecFile object for jumping over bad data at the start of a file
* Improved support for complex and multi-channel VDIF data
* Added support for filter code 7 (19.6 MHz) on ADP
* Added support for beam 3 on ADP

* Fixed a bug in driftcurve.py that put a cos(decliation) correction into the LFSM runs
* Updated the documentation to reflect that unittest2 is now required as of 1.2.2 for Python 2.6 support
* Added argparse as an extra dependency for Python 2.6
* Moved the scripts that ship with LSL to argparse for command line parsing
* Added a new lsl.misc.parser module to help with the switch over to argparse
* Updated the minimum PyEphem version of 3.5.7.3
* Fixed a bug in lsl.misc.ionosphere that causes some UQR files to fail to parse
* Updated the URL/filename structure used to download the CODE files in lsl.misc.ionosphere
* Added support for MCS MIBs stored as .gdb files
* Added support for writing comments and history to FITS-IDI, SDFITS, and UVFITS files
* Changed the lsl.reader.ldp.DRXFile class to deal with small (<50 frame) gaps in DRX files
* Changed the lsl.reader.cor module to ensure the YX is valid for the autocorrelations
* Worked on reduced the memory usage of the FITS-IDI writer
* Adjusted the TBW duration calculation to reflect that DP can output TBW twice as fast now
* Changed the lsl.common.sdf and lsl.common.sdfADF to allow "flat" Projects and Sessions
* Fixed a problem triggering auto-copy in SDFs when not session comments are provided
* Fixed a problem in some of the lsl.writer modules that caused duplicate entries to end up in SOURCE tables
* Added support for interferometer definition files (IDFs)

* Fixed a problem with the conditional dependencies in setup.py for older versions of setuptools
* Increased the default ring segment count for lsl.reader.buffer.DRXFrameBuffer to better deal with LWA-SV data
* Increased the number of frames examined by lsl.reader.ldp.DRXFile to better deal with LWA-SV data

* Bumped the minimum PyFITS version to 3.2
* Fixed a bug in setup.py that causes it to crash when 'pkg-config' is not installed
* Fixed a memory leak in the new, more flexible lsl.reader modules
* Fixed a problem with the data ordering in the lsl.writer modules when a high time resolution (<~2 ms) is used
* Fixed a bug in the DR spectrometer reader which incorrectly mapped tuning 2, Stokes I for IQUV-mode observations
* Fixed a bug in the new measurement set writer
* Added multiple IF support to the FITS IDI writer and reader
* Added multiple IF/spectral window support to the CASA measurement set writer
* Worked on making the lsl.writer.fitsidi and lsl.writer.measurementset modules more robust
* Fixed a bugs in the VDIF reader and writer
* Fixed a few bugs in the scripts that ship with LSL
* Added unittest2 as an extra dependency for Python 2.6

* Added a new lsl.common.color module to help bring color to ANSI terminals
* Small fix to lsl.imaging.utils.plotGriddedImage() to get the image scale correct for non-all-sky images
* Finished moving imageIDI.py over to using the lsl.imaging modules
* Changed the default FFT length in correlateTBN.py to 16 channels
* Fixed a bug in lsl.common.sdf/sdfADP that caused parseSDF() to crash on SDFs generated by MCS when beam delays/gains were specified
* Updated lsl.common.sdfADP to allow two beams at LWA-SV
* Cleaned up a few messages in lsl.sim.vis and lsl.reader.ldp so that they use the warnings module
* Made problems in lsl.statistics.robust raise ValueErrors if a problem is encountered
* Added functions to lsl.common.adp to calculate the magnitude response of the TBN and DRX filters
* Small fix to lsl.common.metabundle(ADP).getSessionMetaData() to make it more robust
* Updated the lsl.skymap.SkyMapLFSM module to the 2018 April 23 version of the model
* Added support for the UQR global ionospheric model to the lsl.misc.ionosphere module
* Updated the lsl.reader.cor module to support what ADP at LWA-SV is currently capable of generating
* Added OVRO-LWA as a valid station for a few of the LSL scripts that do not depend on detailed configuration information
* Fixed a bug in lsl.common.metabundle*.getSessionMetaData() when parsing metadata from failed observations
* Various performance enhancements to the C extentions in lsl.correlator
* Updated the various lsl.reader extensions to use the read() method of the filehandle to make them more flexible
* Improved support for TBF in the lsl.reader.ldp module
* Added a writeto() method to lsl.common.sdf/sdfADP.Project to make it easier to write an SDF to a file
* Fixed a bug in the PyFFTW usage in lsl.correlator.filterbank and fixed the output scaling
* Added a new lsl.version.get_fingerprint() function to help keep track of local changes made to the LSL installation
* Added support for writing correlated data to a CASA measurement set
* Added ARX filter response measurements for Sevilleta