Add "speaksfor" to credential type array.

protogeni/security/credential.rnc

 #
-# Copyright (c) 2008-2009 University of Utah and the Flux Group.
+# Copyright (c) 2008-2013 University of Utah and the Flux Group.
 # 
 # {{{GENIPUBLIC-LICENSE
 # 
@@ -94,7 +94,7 @@ credentials = element credential {
     ## The ID for signature referencing.
     attribute xml:id {xs:ID},
     ## The type of this credential. Currently a Privilege set or a Ticket.
-    element type { "privilege" | "ticket" | "capability" },
+    element type { "privilege" | "ticket" | "capability" | "speaksfor" },
     ## A serial number.
     element serial { xsd:string },
     ## GID of the owner of this credential. 

protogeni/security/credential.xsd

 <?xml version="1.0" encoding="UTF-8"?>
 <!--
   
-  Copyright (c) 2008-2009 University of Utah and the Flux Group.
+  Copyright (c) 2008-2013 University of Utah and the Flux Group.
   
   {{{GENIPUBLIC-LICENSE
   
@@ -171,6 +171,7 @@
         <xs:enumeration value="privilege"/>
         <xs:enumeration value="ticket"/>
         <xs:enumeration value="capability"/>
+        <xs:enumeration value="speaksfor"/>
       </xs:restriction>
     </xs:simpleType>
   </xs:element>