Merge: CallSite on AFor and ARange

Use CallSite to resolve and type some implicit services.
Subsequent phases will like them!

Currenlty: all the AFor and ARange services are converted and tools updated.
TODO: Array and SuperString

Pull-Request: #370
Reviewed-by: Alexandre Terrasa <alexandre@moz-code.org>

diff --cc src/naive_interpreter.nit
Simple merge

diff --cc src/rapid_type_analysis.nit
Simple merge

diff --cc src/typing.nit
Simple merge