Modifications all over the place, but mainly only to update Doxygen documentation

git-svn-id: https://svn.pjsip.org/repos/pjproject/trunk@515 74dad513-b988-da41-8d7b-12977e46ad98
diff --git a/pjsip/include/pjsip-simple/pidf.h b/pjsip/include/pjsip-simple/pidf.h
index 1b57c5d..ccd844c 100644
--- a/pjsip/include/pjsip-simple/pidf.h
+++ b/pjsip/include/pjsip-simple/pidf.h
@@ -32,6 +32,7 @@
 /**
  * @defgroup PJSIP_SIMPLE_PIDF PIDF/Presence Information Data Format (RFC 3863)
  * @ingroup PJSIP_SIMPLE
+ * @brief Support for PIDF/Presence Information Data Format (RFC 3863)
  * @{
  *
  * This file provides tools for manipulating Presence Information Data