add new page on memory management and mage cystal a section (like news)

_layouts/crystal.html

@@ -0,0 +1,21 @@
+---
+layout: site
+---
+
+<div class="row vspace10">
+	<div class="span10">
+		<h2 class="center">{{page.title}}</h2>
+		<div>
+      {{content}}
+		</div>
+	</div>
+	<div class="span2">
+		<h2 class="center">More Detail</h2>
+		<div>
+  		<ul class="nav nav-list">
+        <li><a href="/crystal/layers.html"> Layers of Crystal </a> </li>
+        <li><a href="/crystal/memory.html"> Memory </a> </li>
+  		</ul>
+		</div>
+	</div>
+</div>