New style : Lluelles for LexisNexis publications #law #french #canada

LexisNexis uses a modified "Guide Lluelles" (lluelles.csl) for french publications in Québec (full notes, no ibid).

**Proposed title:** LexisNexis Québec (Guide Lluelles modifié, French - Canada)
*Structure:* name (base, language)
("modifié" ~ "variant of")

**Proposed filename:** lluelles-lexisnexis.csl
*Structure:* base-variant.csl

Also: the pull corrects a mistake in a previous lluelles.csl update (no space before ";" in french canadian).