initial support for "earth" style particle display
improve grib record logic for undefined values
finalize initial particle map support
fix case of lines wrapping the wrong way around the world
Adding igore files.
Adding control if the compiling system has opengl or not.
Merge pull request #162 from seandepagnier/grib-earth

Grib earth
Merge pull request #163 from seandepagnier/master

A few small bug fixes
Merge pull request #164 from NicolasJourden/master

OpenCPN compilation crash if OpenGL is not present.
Correct rendering of skewed polyconic raster charts (FS#1532)
Correct occasional chart info window display error. (FS#1500)
Rename Ivory Coast to Ivory coast to be consistent with the rest of the country names being in English and prevent minor problems with gettext.
fix logical error which also breaks the build on windows
add geometry include which is needed only on windows