可以安装额外的插件，而且也更方便。

If you want to do additional customization or add more Vim plugins, create a ~/.janus directory and add your plugins there, either with a git clone or by adding submodules to your own git repository there. This directory is treated like a normal pathogen directory. For example:

$ cd ~/.janus
$ git clone https://github.com/vim-scripts/Rename2.git rename2

Or, if you have a git repository in ~/.janus, you can use a submodule:

$ cd ~/.janus
$ git submodule add https://github.com/vim-scripts/Rename2.git rename2

我装了这三个：

➜  .janus  ls
sparkup      vim-airline  vim-fugitive