* graph_code/graph_code_class_analysis.ml: skeleton dispatched_methods,
just the unit test
* graph_code/graph_code_class_analysis.ml: naive dispatched_methods
* lang_php/analyze/foundation/graph_code_php.ml: actually dispatch!
* tests/php/codegraph/dynamic_dispatch.php: support
fix bug, now works on epriestley code
* code_map/model2.ml: fine grained display of use of constant and class constants