Add CREDITS file

Signed-off-by: Corey Bryant <coreyb@linux.vnet.ibm.com>
Acked-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Add mailing list and maintainers to README

Signed-off-by: Corey Bryant <coreyb@linux.vnet.ibm.com>
Acked-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Update build directions in INSTALL file

Signed-off-by: Corey Bryant <coreyb@linux.vnet.ibm.com>
Acked-by: Stefan Berger <stefanb@linux.vnet.ibm.com>