Modify by:  Vic
            http://www.libgod.com
            vic@libgod.com

How_to_Install_on_Unix:
    $ git clone https://git.oschina.net/vic.liu/vim_runtime.git ~/.vim_runtime
    $ cat ~/.vim_runtime/install.sh
    $ bash ~/.vim_runtime/install.sh <system>
      <sytem> can be `mac`, `linux` or `windows`

How_to_Upgrade:
    $ cd ~/.vim_runtime
    $ git pull