Doxygen: Alter options that impact performance or readability

Nobody really needs call and class graphs and they are extremely
impractical to both render *and* display given the size and complexity
of our codebase.

Doxyfile

@@ -1280,12 +1280,12 @@ CLASS_GRAPH            = YES
 # indirect implementation dependencies (inheritance, containment, and 
 # class references variables) of the class with other documented classes.
 
-COLLABORATION_GRAPH    = YES
+COLLABORATION_GRAPH    = NO
 
 # If the GROUP_GRAPHS and HAVE_DOT tags are set to YES then doxygen 
 # will generate a graph for groups, showing the direct groups dependencies
 
-GROUP_GRAPHS           = YES
+GROUP_GRAPHS           = NO
 
 # If the UML_LOOK tag is set to YES doxygen will generate inheritance and 
 # collaboration diagrams in a style similar to the OMG's Unified Modeling 
@@ -1318,15 +1318,15 @@ INCLUDED_BY_GRAPH      = YES
 # the time of a run. So in most cases it will be better to enable call graphs 
 # for selected functions only using the \callgraph command.
 
-CALL_GRAPH             = YES
+CALL_GRAPH             = NO
 
 # If the CALLER_GRAPH and HAVE_DOT tags are set to YES then 
 # doxygen will generate a caller dependency graph for every global function 
 # or class method. Note that enabling this option will significantly increase 
 # the time of a run. So in most cases it will be better to enable caller 
 # graphs for selected functions only using the \callergraph command.
 
-CALLER_GRAPH           = YES
+CALLER_GRAPH           = NO
 
 # If the GRAPHICAL_HIERARCHY and HAVE_DOT tags are set to YES then doxygen 
 # will graphical hierarchy of all classes instead of a textual one.
@@ -1375,22 +1375,22 @@ DOT_GRAPH_MAX_NODES    = 50
 # code bases. Also note that the size of a graph can be further restricted by 
 # DOT_GRAPH_MAX_NODES. Using a depth of 0 means no depth restriction.
 
-MAX_DOT_GRAPH_DEPTH    = 0
+MAX_DOT_GRAPH_DEPTH    = 2
 
 # Set the DOT_TRANSPARENT tag to YES to generate images with a transparent 
 # background. This is enabled by default, which results in a transparent 
 # background. Warning: Depending on the platform used, enabling this option 
 # may lead to badly anti-aliased labels on the edges of a graph (i.e. they 
 # become hard to read).
 
-DOT_TRANSPARENT        = NO
+DOT_TRANSPARENT        = YES
 
 # Set the DOT_MULTI_TARGETS tag to YES allow dot to generate multiple output 
 # files in one run (i.e. multiple -o and -T options on the command line). This 
 # makes dot run faster, but since only newer versions of dot (>1.8.10) 
 # support this, this feature is disabled by default.
 
-DOT_MULTI_TARGETS      = NO
+DOT_MULTI_TARGETS      = YES
 
 # If the GENERATE_LEGEND tag is set to YES (the default) Doxygen will 
 # generate a legend page explaining the meaning of the various boxes and