Add mailing list references

Signed-off-by: Jeff Scheel <scheel@us.ibm.com>

Intrinsics_Reference/bk_main.xml

@@ -80,7 +80,9 @@
       <para>This document is a Non-standard Track, Work Group Specification work product owned by the
       System Software Workgroup and handled in compliance with the requirements outlined in the
       <citetitle>OpenPOWER Foundation Work Group (WG) Process</citetitle> document.  It was
-      created using the <citetitle>Master Template Guide</citetitle> version &template_version;.</para>
+      created using the <citetitle>Master Template Guide</citetitle> version &template_version;.
+      Comments, questions, etc. can be submitted to the public mailing list  for this document at 
+      <email>syssw-programming-guides@mailinglist.openpowerfoundation.org</email>.</para>
     </abstract>
 
     <revhistory>

Porting_Vector_Intrinsics/bk_main.xml

@@ -63,7 +63,7 @@
       <citetitle>OpenPOWER Foundation Work Group (WG) Process</citetitle> document.  It was
       created using the <citetitle>Master Template Guide</citetitle> version 0.9.5. Comments,
       questions, etc. can be submitted to the public mailing list  for this document at 
-      <link xlink:href="http://tbd.openpowerfoundation.org">TBD</link>.</para>
+      <email>syssw-programming-guides@mailinglist.openpowerfoundation.org</email>.</para>
     </abstract>
 
     <revhistory>

README.md

@@ -39,10 +39,14 @@ can be found in the LICENSE file or online at
   http://www.apache.org/licenses/LICENSE-2.0
 
 ## Community
-TBD...
+To comment on, propose changes, and engage in community dialogue, you can open issues 
+in the [Project Issues](https://github.com/OpenPOWERFoundation/ELFv2-ABI/issues) or post to
+the community mailing list \([syssw-programming-guides@mailinglist.openpowerfoundation.org](mailto://syssw-programming-guides@mailinglist.openpowerfoundation.org)\).
 
 ## Contributions
-TBD...
+To contribute to the project, post patches to the community mailing list 
+\([syssw-programming-guides@mailinglist.openpowerfoundation.org](mailto://syssw-programming-guides@mailinglist.openpowerfoundation.org)\)
+where they will be reviewed and approved when ready.
 
 Contributions to this project should conform to the `Developer Certificate
 of Origin` as defined at http://elinux.org/Developer_Certificate_Of_Origin.