Release v0.5

• New config options: station_metadata_path and waveform_data_path to
  read station metadata and waveform data from files. Supports any metadata
  format supported by ObsPy and SDS (SeisComp Data Structure) waveform
  archives.
• Filter catalog files on reading using the criteria in the config file
• Improved time axes in plot_timespans and plot_slip for short time
  intervals
• print_families: autoset duration units based on the average duration
• plot_timespans: default sorting changed to family_number