WLang update to take into account the value from the browser
Merge branch '0.4' into WLang-v2
Fixes on WLang.php
Added a Lang var in Session

- Database modified
- Fixes some Charset in SQL file
Changed requests in User model to manage Lang
Added two getters for language configuration
Merge pull request #78 from Creatiwity/WLang-v2

WLang management improved