Just install janus
Create a custom vim file for overriding some janus defaults and replace the contents of those files with the respective files included in this gist.
$ touch ~/.vimrc.after
$ touch ~/.vimrc.before
Install some additional plugins
$ mkdir ~/.janus
$ cd ~/.janus
$ git clone https://github.com/tpope/vim-surround.git
$ git clone https://github.com/mattn/zencoding-vim.git
$ git clone https://github.com/Townk/vim-autoclose.git
$ git clone https://github.com/bling/vim-airline.git
$ git clone https://github.com/myusuf3/numbers.vim.git
$ git clone https://github.com/vim-scripts/Align.git
$ git clone https://github.com/slim-template/vim-slim.git
$ git clone https://github.com/airblade/vim-gitgutter.git
$ git clone https://github.com/jtratner/vim-flavored-markdown.git
$ git clone https://github.com/othree/html5.vim.git
$ git clone https://github.com/kana/vim-textobj-user.git
$ git clone https://github.com/nelstrom/vim-textobj-rubyblock.git
$ git clone https://github.com/groenewege/vim-less.git
$ git clone https://github.com/mxw/vim-jsx.git