I haven't been here long but I am really happy about the collaboration basis of Wiki tree. Personally, I find history fascinating and obviously it's great to find out about our ancestors but I don't think we own them and if others can help that's great.
Your post sent me off wondering what, if any, sources were readily available for your French ancestors. I don't know much about French sources but I live here and it's obvious the French are very 'into' genealogy so I thought it was a good time to learn .
I've written down what I've found because it may be of some use to you. If it isn't well it taught me something!
The Isere Archives has many records online http://www.archives-isere.fr/1425-archives-en-ligne.htm You have to tick to say that you agree with conditions but then searching is not difficult if you know the commune and dates as you do. It would be very much harder without) because the records aren't indexed.
French old documents are a bit a struggle to read and some of the pages in very poor condition .However, it didn't take long to find the baptism entry for your Paul Bonin Martinet http://www.wikitree.com/wiki/Bonin_Martinet-1
It is in the baptismal register for St Laurent 1637-40
The reference is Image : 77 Cote : 9NUM3/AC185/84
When you've found an image you want to record there is a basket (panier) which you place the image in. You can then convert all the images into PDFs It's very easy to use and an excellent resource.
I also found this site that partly solves the indexing problem for some records.
This is the local circle of genealogists and they have indexed some records. You can find many Bonin Martinets by searching in the various boxes (there are a lot of wills for the family). Unfortunately the actual documents are then on a pay to view site.( I haven't investigated that) Nevertheless, I suspect that the dates are helpful if the records are in the Isere Archives. Also in the marriage contracts section you do get both the husband and wifes surname and the year of marriage.