[-] MO: Fix sendtoafriend module #PSCFV-8340

http://code.google.com/p/jquery-json/issues/detail?id=43
[-] MO: Fix newsletter module mail like newsletter_voucher.html

- Edit html/css/translation for newsletter_conf.html and
newsletter_verif.html
- Use {color} variable
Merge pull request #461 from cinscaen/development

[-] MO: Fix "sendtoafriend" and "blocknewsletter" module