Add .small support to blockquote citations.

twbs/bootstrap#11414

Author: pytkin

css/flat-ui.css

@@ -406,13 +406,15 @@ blockquote p {
   font-weight: normal;
   margin-bottom: .4em;
 }
-blockquote small {
+blockquote small,
+blockquote .small {
   font-size: 18px;
   line-height: 1.72222;
   font-style: italic;
   color: inherit;
 }
-blockquote small:before {
+blockquote small:before,
+blockquote .small:before {
   content: "";
 }
 blockquote.pull-right {

less/modules/type.less

@@ -177,7 +177,8 @@ blockquote {
     font-weight: normal;
     margin-bottom: .4em;
   }
-  small {
+  small,
+  .small {
     font-size: @font-size-base;
     line-height: @line-height-base;
     font-style: italic;