- move Handler to its own module
- rename .gen_psd_xmldoc() to .__get_psd_xmldoc() following conventions used in inspiral.Data
- inspiral.py: excise gracedb code from Data object, encapsulate in GracedBWrapper class
- remove now unused write_psd_fileobj() from reference_psd.py
- move Data class to lloidhandler.py
- rename ._gatehandler() .__gatehandler() for consistency
- remove .flush(), unused locking wrapper of .__flush()
- remove .do_gracedb_alerts(), unused locking wrapper of .__do_gracedb_alerts()
- excise eye candy from Data class, move to stand-alone EyeCandy class
- merge what remains of Data and Handler into a single class
- excise segment tracking from result, move to stand-alone SegmentsTracker class
- use Handler's PSDs for GracedB uploads instead of getting new ones
  (addresses a FIXME)

gstlal-calibration:  new element lal_dqtukey that reads in a bit vector and outputs a stream that makes smooth transitions between zero and one based on the bit vector.

snglbursttable.py: fix import to _snglbursttable to not be relative, which causes ValueError: Attempted relative import in non-package

feature_extraction: add fake live data source (white_live), add special case for default gps start time since fake live sources do not seem to be seekable or able to change gps time offsets, add seeking for fake sources. fxtools/utils.py: fix issue with feature saving directory structure when gps times are less than 10 digits

- If EOS is reached before the required number of FFTs are computed to make transfer functions, a transfer function will be written with the available data
- Added option to take a median of transfer functions instead of averaging them with a mean
- Added option to store the first transfer function computed after a gap, so that it can be used after the next gap.

used for the cosmic string search trigger generator
see commit a34aa048

a more streamlined version of the conventional lalapps_StringSearch