Merge: Fix visibility importation

Pull-Request: #360
Reviewed-by: Lucas Bajolet <r4pass@hotmail.com>

diff --cc src/debugger.nit
Simple merge

diff --cc src/modelbuilder.nit
Simple merge

diff --cc src/typing.nit
Simple merge

diff --cc tests/bench_string_append.nit
Simple merge

diff --cc tests/sav/nitmetrics_args1.res
Simple merge