EAC/ETC2 tiles almost working.
Merge branch 'develop' of https://github.com/mousebird/WhirlyGlobe into develop
ETC2 working
Merged ETC2 changes
Merge branch 'develop' of https://github.com/mousebird/WhirlyGlobe into develop
Merge branch 'develop' of https://github.com/mousebird/WhirlyGlobe into develop
Merge