Fix normalization (wrapping) of coordinates such as longitude.

To properly extract and plot the subgrid of the layer grid that
covers the map bounding box, wrapping coordinates (longitudes)
need to be normalized to the range of the map reference system.
Since this is not done by existing classes,
we must do it in the pixel map hack.
Remove bogus print of exception stack trace.
Merge branch 'pixel_map_rendering_hack' into run_socib
Merge branch 'fix_remove_legacy_time_axis_code' into run_socib
Merge branch 'direction_layers' into run_socib
Add palettes in use at SOCIB.