Update index_fr.jade

bricoles
Merge pull request #50 from jacquarg/master

Add mozLastack field, update to cozy-ical 1.1.3. Fix cozy-calendar#137.
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Please note that French for "calendar" is "agenda" for your service, whatever the module of cozy.
Merge pull request #51 from goofy-bz/patch-2

polishing info messages
Merge pull request #49 from goofy-bz/patch-1

Update index_fr.jade
Send calendar color through caldav.