title: How to force git to add dotfiles to repository
body: <p>Git seems to always ignore these.</p>
  <p>When I type <code>git add .</code>, dotfiles in <code>GIT_DIR</code> are added, but not from subdirectories. On the other hand, <code>git add subdir/.dotfile</code> won't work.</p>
  <p>I tried <code>git add -f</code> and putting <code>!.*</code> in <code>GIT_DIR/.git/info/exclude</code>.</p>