Package manager for MacOSX

    #
    # Install package manager for macosx called brew from https://brew.sh
    #
    # Install
    $ /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

    # If your brew installation have problem with error writing to /usr/local
    # then try to uninstall then install brew again.
    #
    # Uninstall
    $ /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/uninstall)"