use %lu for size_t in printf
Correct double overlay display
Correct spacing
Correct for minimal no OpenGL build.
Refactor S57 SOUNDG rendering logic.
Adjust cm93 scale selection logic to avoid excessive underzoom.
Merge pull request #144 from nkiesel/master

use %lu for size_t in printf
Merge pull request #145 from Ptizef/master

Some grib_pi improvements