Update REML docs

Note that, from REML v2.1.0, all REML in code snippets database
collection is fully REML conformant.

Author: delphidabbler

csdb/docs/reml.html

@@ -135,7 +135,17 @@ <h2>
   </p>
   <pre class="sample">&lt;p&gt;wrong &lt;/p&gt;&lt;heading&gt;blah&lt;/heading&gt;&lt;p&gt;wrong &lt;/p&gt;&lt;p&gt;blah&lt;/p&gt;&lt;p&gt;wrong&lt;/p&gt;</pre>
   <aside>
-    <strong>Note:</strong> The Code Snippets Database collection <em>may</em> contain such non-conforming REML. Therefore REML interpreters designed for use with the collection <span class="very-strong">must</span> be able to handle text without enclosing block tags.
+    <p>
+      <p>
+        <strong>Note</strong>
+      </p>
+      <p>
+        The Code Snippets Database collection v2.0.x contains such non-conforming REML. Therefore REML interpreters designed for use with that version of the collection <span class="very-strong">must</span> be able to handle text without enclosing block tags.
+      </p>
+    </p>
+    <p>
+      From v2.1.0 of the collection all REML is fully conformant and REML interpreters designed only for v2.1.0 or later are <span class="very-strong">not required</span> to handle text with enclosing tags.
+    </p>
   </aside>
 
   <h2>