Add `Modal` examples to docs
Merge branch 'master' of https://github.com/stevoland/react-bootstrap

* 'master' of https://github.com/stevoland/react-bootstrap:
  Replace `right` prop with `pullRight`
  Docs for `DropdownButton` and `SplitButton`
  `DropdownButton` and `SplitButton` refactor

Conflicts:
	docs/bundle.js
	docs/components.html
	docs/css.html
	docs/getting-started.html
	docs/index.html
	docs/javascript.html
	docs/src/ComponentsPage.js