Updated ROMS plotting package

[arango]

I updated the ROMS plotting package to write out the minimum and maximum values of the primary an secondary (overlay) fields.

The above figure shows a snapshot of the free-surface and barotropic currents. Notice that the range of values for both fields are written on the bottom left corner of the plot for the primary (free-surface) and secondary overlay (barotropic currents) fields.

The user can control the writing of the field statistics in the input scripts, see parameter WRTRANG:

F     PLTLOGO: logical switch Logo.
F     WRTHDR : logical switch to write out the plot header titles.
T     WRTBLAB: logical switch to write out the plot bottom title.
T T   WRTRANG: logical switch to write out data/overlay range values and CI.
F     WRTFNAM: logical switch to write out input primary filename.
F     WRTDATE: logical switch to write out current date.