PROCEDURE: swe_hsk_snap PURPOSE: Plots housekeeping snapshots for times selected with the cursor in a tplot window. USAGE: swe_hsk_snap, hsk=hsk INPUTS: KEYWORDS: $LastChangedBy: dmitchell $ $LastChangedDate: 2014-10-31 14:15:03 -0700 (Fri, 31 Oct 2014) $ $LastChangedRevision: 16106 $ $URL: svn+ssh://thmsvn@ambrosia.ssl.berkeley.edu/repos/spdsoft/trunk/projects/maven/swea/swe_hsk_snap.pro $ CREATED BY: David L. Mitchell 07-25-12