[folks] Clarify which changes in 0.3.1 were API changes.

[Travis Reitter <treitter src gnome org>]

commit f4d219ef0c249a6cda76f0a42d2ee6ce835ead59
Author: Travis Reitter <travis reitter collabora co uk>
Date:   Fri Oct 15 14:25:17 2010 -0700

    Clarify which changes in 0.3.1 were API changes.

 NEWS |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/NEWS b/NEWS
index a1aa128..3639d00 100644
--- a/NEWS
+++ b/NEWS
@@ -3,6 +3,8 @@ Overview of changes from libfolks 0.3.0 to libfolks 0.3.1
 
 Major changes:
 * Tpf.Persona.contact is now guaranteed to have the client type feature
+
+API changes:
 * Add the PersonaStore:can-add-personas property
 * Add the PersonaStore:can-remove-personas property
 * Add the PersonaStore:can-alias-personas property