[visad] VisAD library update...

After the release earlier this week, an issue with contouring was
reported.  This has been fixed and because of the potential impact on
users, I've done a new release.  Here is the change log:

r5946 | rink | 2012-03-07 15:24:38 -0600 (Wed, 07 Mar 2012) | 3 lines
Changed paths:
   M /trunk/core/src/visad/Contour2D.java

fix bug DonM found in processLineArray:  even if only one contour interval,
use same rule for deciding to label or not (the number of pts threshold)

Tom Whittaker
University of Wisconsin-Madison
Space Science & Engineering Center (SSEC)
Cooperative Institute for Meteorological Satellite Studies (CIMSS)
1225 W. Dayton Street
Madison, WI  53706  USA
ph: +1 608 262 2759