Added support for height attribute.

css/tests.css

@@ -128,3 +128,7 @@ h2 {
   width: 3.125rem;
   width: 100%;
 }
+#test-height {
+  height: 50px;
+  height: 3.125rem;
+}

index.styl

@@ -170,9 +170,12 @@ border-radius()
 
 /* Width */
 
-width(w)
+width()
 	abstract-longhand('width', arguments)
 
+height()
+	abstract-longhand('height', arguments)
+
 /* Relative and absolute positioning */
 
 top()

tests.html

@@ -74,6 +74,10 @@
 		<h2>Width</h2>
 		<div id='test-width-hundred-percent' data-assert='width: 1000px'>width 100%</div>
 	</section>
+	<section>
+		<h2>Height</h2>
+		<div id='test-height' data-assert='height: 50px'>height 50px</div>
+	</section>
 	<script src='dom-style-test-runner.js'></script>
 
 </body>

tests.styl

@@ -107,4 +107,8 @@ h2
 // width
 #test-width-hundred-percent
 	width 50px
-	width 100%
\ No newline at end of file
+	width 100%
+
+// height
+#test-height
+	height 50px
\ No newline at end of file