improve guess for building height, now skylines look better
less GL_DETPH_TEST switches
enable glDepthMask before clearing depth buffer:
- fixes building rendering on nexus and asus tablet
make sure BLEND is enabled
fix wrap over date-line, again
started on-hold mode to avoid relabeling while zoom gesture is active
sort tiles to make labeling more deterministic
ignore++
reworking the gl projection/unprojection stuff
building shader experiments
more line intersection utilities
increase read-buffer if necessary
add shader for depth buffer testing
formatting
cleanup extrusion layer when it was not compiled
use setTileMatrix utility function
use special landuse=urban tag