******* Changes from Extractor 1.0d -> 1.0k *********
Fixed the polygon region detection.
Fixed exposure keyword in primary header of the spectral file.
Sped up writing out events list for files of exactly the SAME format.
Now clips Polygon at edge of region.
Fixed the unbinned lightcurve files for XRONOS compatibility.
The light curve binning can now be < 1.0.
Changed the clocking routine - this REALLY speeds the extract command up.