Update submodule references

Updated references to:
         	    bundle/base16-vim
	            bundle/command-t
 	            bundle/nerdcommenter
	            bundle/nerdtree
	            bundle/python-mode
	            bundle/syntastic
	            bundle/tagbar
	            bundle/tlib_vim
	            bundle/undotree
	            bundle/vim-airline
	            bundle/vim-bundler
	            bundle/vim-fugitive
	            bundle/vim-git
	            bundle/vim-gitgutter
	            bundle/vim-haml
	            bundle/vim-rails
	            bundle/vim-ruby
	            bundle/vim-snipmate
	            bundle/vim-snippets
	            bundle/vim-surround
Add plugin

Added vim-buffergator.