Update submodules

M  .vim/bundle/html5
M  .vim/bundle/nginx.vim
M  .vim/bundle/vim-dispatch
M  .vim/bundle/vim-fugitive

Automatically generated:
  source: .shell/funcs:update_submodules()
  time:   Thu 25 Aug 01:41:28 BST 2016
  host:   penguin.lw.kodo.org.uk