git clone https://github.com/mileszs/ack.vim.git ~/.vim/bundle/ack.vim
git clone https://github.com/scrooloose/nerdtree.git ~/.vim/bundle/nerdtree
git clone https://github.com/vim-airline/vim-airline ~/.vim/bundle/vim-airline
git clone https://github.com/tpope/vim-fugitive.git ~/.vim/bundle/vim-fugitive