Add timestamp to "all done" message

Add timestamp to the "all done" message at the end of distance_omnibus.pro.
This is purely cosmetic, but may be helpful for knowing how long it took to run
this monster.

	modified:   distance_omnibus.pro
Correct fix for the "Big Island" problem in OMNI_GRS_MASKSPEC

Correct fix for the "Big Island" problem, which was attempted in the 09/17/14
fix.  Now, the routine identifies islands above the THRESHOLD value, then
analyzes each island for multiple summits (a la the Big Island of Hawaii).  In
this way, if one island has multiple summits, they will be analyzed
individually using the criteria for multiple peaks in the spectrum.

	modified:   subroutines/omni_grs_maskspec.pro