Update revue-francaise-de-sociologie.csl

- Fix editors names not using the same convention as authors names.
- Fix an issue with reports where collection title was duplicated.
- Display note (Extra) if present.

About the last point, I'm not sure that's the correct way of handling this. My goal is in particular to allow referencing R packages this way:
Bouchet-Valat M., 2012, logmult: Log-multiplicative models, including association models, R package version 0.5.
(with "R package version 0.5." being in the Extra field)