_center.scss in patterns-0.1.3

- old
+ new

@@ -1,19 +1,32 @@
-@mixin center {
+@mixin horizontally_center {
   margin: 0px auto;
 }
-@mixin center_container {
+@mixin horizontal_center_container {
   text-align: center;
   & > * {
     margin: 0px auto;
     text-align: left;
   }
 }
+
+// http://www.jakpsatweb.cz/css/css-vertical-center-solution.html
+@mixin vertical_center_container {
+  display: table;
+  position: static;
+
+  & > * {
+    display: table-cell;
+    vertical-align: middle;
+    width: 100%;
+  }
+}
+
 /*
 http://css-tricks.com/centering-in-the-unknown/
 Changes the parent
 */
-@mixin center_container_unknown {
+@mixin center_container {
   text-align: center;
   &:before {
     content: '';
     display: inline-block;
     height: 100%;
\ No newline at end of file