add audience section to introduction

index.html

@@ -175,6 +175,23 @@ <h1>Introduction</h1>
 
 	</section>
 
+	<section class="informative">
+		<h2>
+		  Audience
+		</h2>
+		<p>
+This specification has three primary audiences: implementers of conformant DID methods;
+implementers of conformant DID resolvers; and implementers of systems and services 
+that wish to resolve DIDs using DID resolvers. The intended audience includes, 
+but is not limited to, software architects,  data modelers, application developers, 
+service developers, testers, operators,  and user experience (UX) specialists. 
+Other people involved in a broad range  of standards efforts related to decentralized 
+identity, verifiable credentials,  and secure storage might also be interested in 
+reading this specification.
+		</p>
+
+	  </section>
+
 </section>
 
 <section id="terminology">