DQ flag updates since last report on February 21, 2008

* Inserted updated seismic flags for H1, H2, and L1 for the
  frequency band 0.03-0.10 Hz which is a good indicator for
  earthquakes and aftershocks:
  SEISMIC_X_30_100_mHz_LOWTHRESH 
  SEISMIC_X_30_100_mHz_MEDTHRESH
  SEISMIC_X_30_100_mHz_HIGHTHRESH 
  SEISMIC_Y_30_100_mHz_LOWTHRESH
  SEISMIC_Y_30_100_mHz_MEDTHRESH 
  SEISMIC_Y_30_100_mHz_HIGHTHRESH
  (Alistair Hayden)

* Inserted new flags for times of potential fringe-wrapping
  light scattering between H1 and H2 based on excess power
  in 1-4 Hz of either interferometer's DARM_CTRL channel.
  H1H2_SCATTERING
  (Robert Schofield)