message: Try fixing Mac Travis by accommodating their env. changes
  They keep changing the environment and breaking these builds for silly reasons.
  Hopefully this fixes it again.
diff: @@ -56,7 +56,7 @@ before_install:
  popd;
  fi"
  install:
  - - "if [ $TRAVIS_OS_NAME = 'osx' ]; then brew uninstall json-c; fi"
  + - "if [ $TRAVIS_OS_NAME = 'osx' ]; then brew uninstall --ignore-dependencies json-c; fi"
  - "if [ $TRAVIS_OS_NAME = 'osx' ]; then /usr/bin/yes | pip uninstall numpy; fi"
  - "if [ $TRAVIS_OS_NAME = 'osx' ]; then brew install libusb opencv; fi"
  - "if [ $TRAVIS_OS_NAME = 'osx' ]; then brew install jsoncpp; fi"
  