* code_map/view_overlays.ml: factorize and skeleton for hentities_of_file
* code_map/view_overlays.ml: misc
* code_map/view_overlays.ml: entity_at_line
* code_map/view_overlays.ml: highlight uses and users of an entity :)
* code_map/view_overlays.ml: adjust entity under cursor heuristic
* authors.txt: update
* copyright.txt: 2013
* external/dependencies.txt: update
* travis-ci.sh: comments