added reset-baseline to vertical rhythym

frameworks/compass/stylesheets/compass/typography/_vertical_rhythm.scss

@@ -59,6 +59,11 @@ $base-half-leader: $base-leader / 2;
   }
 }
 
+// resets the baseline to 1 leading unit
+@mixin reset-baseline {
+  @include adjust-leading-to(1, if($relative-font-sizing, $base-font-size, $base-font-size));
+}
+
 // Show a background image that can be used to debug your alignments.
 // include the $img argument if you would rather use your own image than the
 // Compass default gradient image.

test/fixtures/stylesheets/compass/css/vertical_rhythm.css

@@ -40,3 +40,6 @@ html > body {
   border-bottom-style: solid;
   border-bottom-width: 0.25em;
   padding-bottom: 0.417em; }
+
+.reset {
+  line-height: 1.143em; }

test/fixtures/stylesheets/compass/sass/vertical_rhythm.scss

@@ -12,3 +12,5 @@ $base-line-height: 16px;
 
 .borders { @include h-borders(1px,1); }
 .large-borders { @include adjust-font-size-to(24px,3); @include h-borders(6px,1,24px); }
+
+.reset { @include reset-baseline; }