Adding graph generation to Doxyfile

Added class graph, caller and call graph

Doxyfile

@@ -2107,7 +2107,7 @@ PERL_PATH              = /usr/bin/perl
 # powerful graphs.
 # The default value is: YES.
 
-CLASS_DIAGRAMS         = NO
+CLASS_DIAGRAMS         = YES
 
 # You can define message sequence charts within doxygen comments using the \msc
 # command. Doxygen will then run the mscgen tool (see:
@@ -2138,7 +2138,7 @@ HIDE_UNDOC_RELATIONS   = YES
 # set to NO
 # The default value is: YES.
 
-HAVE_DOT               = NO
+HAVE_DOT               = YES
 
 # The DOT_NUM_THREADS specifies the number of dot invocations doxygen is allowed
 # to run in parallel. When set to 0 doxygen will base this on the number of
@@ -2148,7 +2148,7 @@ HAVE_DOT               = NO
 # Minimum value: 0, maximum value: 32, default value: 0.
 # This tag requires that the tag HAVE_DOT is set to YES.
 
-DOT_NUM_THREADS        = 0
+DOT_NUM_THREADS        = 5
 
 # When you want a differently looking font in the dot files that doxygen
 # generates you can specify the font name using DOT_FONTNAME. You need to make
@@ -2254,7 +2254,7 @@ INCLUDED_BY_GRAPH      = YES
 # The default value is: NO.
 # This tag requires that the tag HAVE_DOT is set to YES.
 
-CALL_GRAPH             = NO
+CALL_GRAPH             = YES
 
 # If the CALLER_GRAPH tag is set to YES then doxygen will generate a caller
 # dependency graph for every global function or class method.
@@ -2265,7 +2265,7 @@ CALL_GRAPH             = NO
 # The default value is: NO.
 # This tag requires that the tag HAVE_DOT is set to YES.
 
-CALLER_GRAPH           = NO
+CALLER_GRAPH           = YES
 
 # If the GRAPHICAL_HIERARCHY tag is set to YES then doxygen will graphical
 # hierarchy of all classes instead of a textual one.