don't force Testing build on linux
[skip ci]
add enum class to unify parsing/stringification
fix errors
make gcc happy
fix font halo units
change halo-width/blur units

refs mapbox/mapbox-gl-style-spec#66
flesh out 'will change region' notifications
disallow copying to avoid accidental unchecked message output
do not reallocate the texture data on every update; use glTexSubImage2D instead
make icons work again
correctly cast buffer
add icon render test
allow for delayed map notifications during animations
Merge branch 'master' of github.com:mapbox/mapbox-gl-native
update value semanatics to be closer to js and add filter expression tests
refs #342 & #346: per-map change callbacks
Merge branch 'master' of github.com:mapbox/mapbox-gl-native
add more comparison tests
separate comparisons and expressions
rename file and fix merge error