Update BlueHighway.ttf to version 5.001. [ci skip]
Revert "Update BlueHighway.ttf to version 5.001. [ci skip]"

This reverts commit cc5135ae4bb53286534502c96d77e4a521683e66. Would change eg. the editor to look completely different.
Properly skip unsupported kerning subtables.
For Travis CI - switch CI build to use OS X build environment.