Update HEAD Doxygen documentation.

doxygen/HEAD/entity_8h__incl.png

doxygen/HEAD/exception-abstract_8h__dep__incl.png

doxygen/HEAD/exception-abstract_8h__incl.png

doxygen/HEAD/exception-factory_8h__dep__incl.png

doxygen/HEAD/exception-factory_8h__incl.png

doxygen/HEAD/exception-signal_8h__dep__incl.png

doxygen/HEAD/exception-signal_8h__incl.png

doxygen/HEAD/exception-traces_8h__dep__incl.png

doxygen/HEAD/exception-traces_8h__incl.png

doxygen/HEAD/factory_8h__incl.png

doxygen/HEAD/functions_8h__incl.png

doxygen/HEAD/graph_legend.png

doxygen/HEAD/group__dgraph.png

doxygen/HEAD/group__signals.png

doxygen/HEAD/import_8h__incl.png

doxygen/HEAD/inherit__graph__0.png

doxygen/HEAD/inherit__graph__1.png

doxygen/HEAD/inherit__graph__10.png

doxygen/HEAD/inherit__graph__11.png

doxygen/HEAD/inherit__graph__12.png