Updated manifest and bug fix
News app improved

- Added two new fields: meta_title and description
- Lang fixes
- SQL optimized
User app improved

- Small modification in the user-form (added new data)
- Formated the views
- SQL request optimized
WLang now displays uppercase by default for unknown values
Improvements on WLang and WRequest

- Tells the user if some data is available
- WLang replaces _ with a white space for unknown lang keys
Merge remote-tracking branch 'origin/0.4' into contact-app
hasData used to know if POST datas are available