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/presence.h b/pjsip/include/pjsip-simple/presence.h
index f8d6352..ee2805f 100644
--- a/pjsip/include/pjsip-simple/presence.h
+++ b/pjsip/include/pjsip-simple/presence.h
@@ -34,6 +34,7 @@
 /**
  * @defgroup PJSIP_SIMPLE_PRES SIP Extension for Presence (RFC 3856)
  * @ingroup PJSIP_SIMPLE
+ * @brief Support for SIP Extension for Presence (RFC 3856)
  * @{
  *
  * This module contains the implementation of SIP Presence Extension as 
@@ -67,6 +68,9 @@
 PJ_DECL(pjsip_module*) pjsip_pres_instance(void);
 
 
+/**
+ * Maximum presence status info.
+ */
 #define PJSIP_PRES_STATUS_MAX_INFO  8
 
 /**