Fixes #14799: Add vertical alignment of image in media component

Signed-off-by: Jenn Dodd <jedodd@pivotal.io>
Remove .media-object from docs.

Signed-off-by: Geoff Pleiss <gpleiss@pivotal.io>
Fix up margins and unnest code
grunt
Merge branch 'pr/14801'

Conflicts:
	dist/css/bootstrap.css.map
	dist/css/bootstrap.min.css
	docs/assets/js/customize.min.js
	docs/assets/js/raw-files.min.js
	docs/dist/css/bootstrap.css.map
	docs/dist/css/bootstrap.min.css