XLSForm syntax docs translated to french!

Thanks to a heroic effort by Anaël BOULIER of Makina Corpus the XLSForm
syntax docs (standard used by formhub, odk aggregate, surveyCTO) etc has
been translated into French!

https://formhub.org/syntax/ (select the french tab)

We'll soon be moving these to a centralized documentation site at
XLSForm.org. However, I just wanted to let you know this wonderful
resource is now available to the French speaking ODK / formhub communities.

Thanks again Anaël!