Revert "remove OS X from Travis temporarily since 'brew install judy' fails"
Revert "remove OS X from Travis temporarily since 'brew install judy' fails"

This reverts commit bfc76d8601f8d2ee3b28c9dbca62d80ba3c10714.

traildb/traildb,tuulos/traildb,tuulos/traildb,tuulos/traildb,traildb/traildb,tuulos/traildb,traildb/traildb