mapImage(): testing speed (remove debugging lines)
src/testing: working on map polygons

The hope is that speed will be increased by grouping polygon plotting
into one call.  So far, the test code does not do any of the offpage
and other testing.  Also, it is not stitched in to the R code; to test
it, use lines in the comment block above the function.
mapImage work (not avail to user yet)
speed up mapImage() if debug=99 used
Merge branch 'filledContour' into develop