Basic first steps to a modified ear clipping tessellator.
Working now in coords local to each feature part.
Adding hole support for polygons.
CMake update.
Improved hole handling in the tessellator.
Moved Tessellator from Util to Features.
Moved tessellator from osgeEarthFeatures to to core osgEarth.
Merge branch 'master' into topic_tessellator
Added tessellator support for multiple primitive sets.
Merge branch 'topic_tessellator'
Fixing compile error in Tessellator.cpp (issue #542).
Small fix.
Fixed bug in BuildGeometryFilter.cpp.
Added include of limits.h in Tessellator.cpp.
Fixing bad commit.
Tessellation fix for small polys.
SimpleSky: adjust the normal-based lighting with the material ambient value
Merge branch 'master' of github.com:gwaldron/osgearth
Fix extra gcc warnings.

When -Wextra flag is enable, gcc complains about base class not
being explicitly initialized in virtual inheritance. This patch
add calls to base ctors.
Fix extra gcc warnings.

Remove useless return type const qualifier.
Merge pull request #546 from polch/gcc-extra-warnings

Gcc extra warnings