comment
Render now color-coded with two colors: red for distance, green for elevation
renderer has cmdline option to render to a file
batch render can take custom render sizes
getViewerHeight() renamed, cleaned up
fixed off-by-one error: left seam is always correctly specified now
render the square at the viewer specially to make sure there are no gaps
fixed incorrect comment
I now make sure both lat and lon don't lie near cell boundaries
moved forward the near clipping plane to render near objects properly