fail when there are test errors

[skip ci]
update headless testing to be configurable
Merge branch 'master' of github.com:mapbox/mapbox-gl-native
fix compile errors
add antialiasing test
CF template for travis testing user and encrypted creds.
add node_modules to gitignore
fix automated headless testing on travis
add html result table
execute correct script
complement of https://github.com/mapbox/mapbox-gl-cocoa/pull/36
Merge branch 'master' into access_token

Conflicts:
	.gitignore