Add OTR protocol v3 spec. web page

Signed-off-by: David Goulet <dgoulet@ev0ke.net>

assets/css/style.css

@@ -48,6 +48,27 @@ code {
 	border-radius: 4px;
 }
 
+ul, ol {
+	margin-left: 2.5em;
+	padding-left: 0;
+	text-align: justify;
+}
+
+h2, h3, h4, h5 {
+	margin-top: 0.7em;
+	margin-bottom: 0.7em;
+}
+
+dd {
+	margin-left: 2.5em;
+	padding-left: 0;
+	font-size: 15px;
+}
+
+dt  {
+	font-size: 15px;
+}
+
 /**************************
  * bootstrappy
  * ***********************/