* code_map/model2.mli: deps intermediate type
* code_map/model_graph_code.ml: estet
* h_program-lang/highlight_code.ml: estet
* code_map/draw_microlevel.ml: defs_of_file part1,
also centralize all hihglight_category vs entity_kind together
* code_map/draw_microlevel.ml: flexible def highlight!
* code_map/model2.ml: comment
factorize code, use G.shortname_of_node
* code_map/model2.ml: flexible highlight uses!