Merge pull request #33 from mespeche/master

Adding update process & french translation too
Improved the Payment module documentation
Merge pull request #34 from roadster31/paymentmodules

Improved the Payment module documentation
complete install process
Improved delivery module documentation, fixed some typos
Merge pull request #35 from roadster31/paymentmodules

Improved delivery module documentation, fixed some typos
Add french translation of Modules/Starting