MAC: Homebrew(代替yum）安裝

安裝
    ruby -e "$(curl -fsSL https://raw.github.com/Homebrew/homebrew/go/install)"

    最新方式請參見官網首頁: http://brew.sh/index.html
    依賴環境 : https://github.com/Homebrew/homebrew/wiki/Installation

使用
    安裝:brew install xxx
    刪除:brew remove xxx
    查看:brew list
    更新:brew upgrade

    更新brew: brew update