Improve doxygen documentation

Create images for inheritance hierarchy.

doxygen/cbmDoxyfile.conf

@@ -92,7 +92,7 @@ ALLEXTERNALS           = NO
 EXTERNAL_GROUPS        = YES
 PERL_PATH              = /usr/bin/perl
 CLASS_DIAGRAMS         = YES
-HAVE_DOT               = NO
+HAVE_DOT               = YES
 CLASS_GRAPH            = YES
 COLLABORATION_GRAPH    = YES
 TEMPLATE_RELATIONS     = YES
@@ -100,10 +100,12 @@ HIDE_UNDOC_RELATIONS   = YES
 INCLUDE_GRAPH          = YES
 INCLUDED_BY_GRAPH      = YES
 GRAPHICAL_HIERARCHY    = YES
-DOT_IMAGE_FORMAT       = png
+DOT_IMAGE_FORMAT       = svg
+INTERACTIVE_SVG        = YES
 DOT_PATH               = 
 DOTFILE_DIRS           = 
 MAX_DOT_GRAPH_WIDTH    = 1024
 MAX_DOT_GRAPH_HEIGHT   = 1024
 GENERATE_LEGEND        = YES
 DOT_CLEANUP            = YES
+GENERATE_LATEX         = NO