Twenty Fourteen: improved responsive styles for featured content and minor layout fixes. Props iamtakashi, see #25592.

git-svn-id: https://develop.svn.wordpress.org/trunk@25854 602fd350-edb4-49c9-b593-d223f7449a82
Twenty Fourteen: fix typo that prevented author name display in Ephemera widget. Props iamtakashi, fixes #25641.

git-svn-id: https://develop.svn.wordpress.org/trunk@25855 602fd350-edb4-49c9-b593-d223f7449a82
Twenty Fourteen: fix non-image attachment page layout, props iamtakashi. Fixes #25624.

git-svn-id: https://develop.svn.wordpress.org/trunk@25856 602fd350-edb4-49c9-b593-d223f7449a82
Twenty Fourteen: revise link colors. Props iamtakashi, see #25640.

git-svn-id: https://develop.svn.wordpress.org/trunk@25857 602fd350-edb4-49c9-b593-d223f7449a82