Merge pull request #1 from PrestaShop/master

Update from master
1) Make rich snippets available via hooks for prestashop 1.5 and above.
2) Store in db only average score and reviews count instead of the entire rich snippet div.
Yotpo : Fixed merge
Merge branch 'alonbr-change-rich-snippets'
Merge branch 'master' of github.com:PrestaShop/PrestaShop-modules