OpenGL ES 3.0 support
Merge branch 'develop' of git+ssh://github.com/mousebird/WhirlyGlobe into develop
Merge branch 'develop' of git+ssh://github.com/mousebird/WhirlyGlobe into develop
Merge branch 'develop' of git+ssh://github.com/mousebird/WhirlyGlobe into develop
Merge branch 'develop' of git+ssh://github.com/mousebird/WhirlyGlobe into develop
Wasn't pulling in DDXML categories, which broke WMS.  ETC2 changes.