corrections and improvements

[JLuc]

Filling fields in the SLA is just one a specific usecase that requires passing lots of arguments. It's very limitating (and a bad idea) to restrict scripting to that specific usecase. And also, its unclear to mention that specific case as is, without any deeper introduction.

SO I'd suggest either

• to totaly drop that sentence
• OR to describe the general ability to pass multiple arguments using a json file as a config file, as i did. This usecase doesnt need an introduction since it's general.
• OR to introduce in details the specific example usecase you were thinking of.

[aoloe]

changed the sentence. even if you still don't like it...