Fix Logging on newsletter subscribing and CS

In ```Front\Controller\NewsletterController``` the logger was writting errors even if the form was on success.
Moreover, the logger was called with its full NS
modified:   local/modules/Front/Controller/NewsletterController.php
Merge pull request #872 from lovenunu/newsletter

Fix Logging on newsletter subscribing and CS
fix ajax return whenan item is added to cart.
jquery validate messages are now in the good language. Fix #868
Merge pull request #874 from lunika/validate_intl

jquery validate messages are now in the good language. Fix #868
Merge pull request #873 from lunika/mini-cart

fix ajax return when an item is added to cart.
Allow slash ended uri
Merge pull request #875 from lovenunu/uri

Allow slash ended path info
force locale in mail. Add locale parameter to intl function. Fixed #845
Merge pull request #877 from lunika/mail

force locale in mail. Add locale parameter to intl function. Fixed #845
Correction if stock of the items = 0

At the time of paying if the stock of the article passes in 0
redirect to cart
Correction At the time of paying if stock of the items = 0

At the time of paying if the stock of the article passes in 0
redirect to cart
Correction
correction if response
coreection
Fixed documentation
remove meta robots tag
Merge pull request #879 from lunika/meta

remove meta robots tag
new option --force to update module with missing directories and files.
updated module.xml skeleton to the new version