Twenty Fourteen: reduce post widget margin, props kraftbj, closes #25426.


git-svn-id: https://develop.svn.wordpress.org/trunk@25729 602fd350-edb4-49c9-b593-d223f7449a82
Twenty Fourteen: accent color fixes, props celloexpressions. See #25220.

 * Try a darker text color for header nave submenu items on hover (matching site description color). 
 * Fix a bad hover color override. 


git-svn-id: https://develop.svn.wordpress.org/trunk@25730 602fd350-edb4-49c9-b593-d223f7449a82