globalv: added NOW for job start GPS time
gw_summary: added --max-processes

    - allows user to specify the max number of processes allowed
data: move references to NOW into globalv
get_data: added get_timeseriesdict

    - now get multiple channels using framecpp with multiprocessed,
      multicannel frame I/O
get_segments: fixed bug in existing segment test
SummaryTab: added longname attribute

    - longer tab name for page title, not used in nav bar
%(ifo)s_config.ini: removed defunct IFO ini files
gw_summary_pipe: DAG generator

    - separates config files into single job per DAGMan node
    - generates wrapping HTML in first parent job
defaults.ini: added some generic plot descriptions
get_channel: general improvements
data.py: added required import
get_spectrogram: set query=False in get_timeseries

    - timeseries data should already have been loaded, trying to get
      more just complicates things
    - improved error reporting for zero-division errors
TimeSeriesPlot: pad with NAN to get gaps in time-series
TimeSeriesPlot: added support for configured lines

    - use X-hline in config file to specify list of y-axis values to
      plot as red, dashed, horizontal lines
builtin_plots: added auto-detect IFO colors
fixed pep-8 line violation