- minor changes in doxygen configuration

doc/doxygen/ser.doxygen

@@ -136,7 +136,7 @@ VERBATIM_HEADERS       = YES
 #---------------------------------------------------------------------------
 # configuration options related to the alphabetical class index
 #---------------------------------------------------------------------------
-ALPHABETICAL_INDEX     = NO
+ALPHABETICAL_INDEX     = YES
 COLS_IN_ALPHA_INDEX    = 5
 IGNORE_PREFIX          = 
 #---------------------------------------------------------------------------
@@ -232,7 +232,7 @@ PERL_PATH              = /usr/bin/perl
 #---------------------------------------------------------------------------
 # Configuration options related to the dot tool   
 #---------------------------------------------------------------------------
-CLASS_DIAGRAMS         = NO
+CLASS_DIAGRAMS         = YES
 HIDE_UNDOC_RELATIONS   = YES
 HAVE_DOT               = YES
 CLASS_GRAPH            = YES
@@ -242,8 +242,8 @@ UML_LOOK               = NO
 TEMPLATE_RELATIONS     = NO
 INCLUDE_GRAPH          = YES
 INCLUDED_BY_GRAPH      = YES
-CALL_GRAPH             = NO
-CALLER_GRAPH           = NO
+CALL_GRAPH             = YES
+CALLER_GRAPH           = YES
 GRAPHICAL_HIERARCHY    = YES
 DIRECTORY_GRAPH        = YES
 DOT_IMAGE_FORMAT       = png