Theme creation a environment config

Added bootstrap 3.0.0
Improved news front for theme purpose
Merge branch '0.4' into theme-grafx
Merge branch '0.4' into theme-grafx
Header + navigator coded
News implementation
WResponse handles CSS and JS added through a retriever within the theme
Updates the user front views
Block right + search bar
News listing template modified with <article>
Merge pull request #75 from Creatiwity/response-model

Output model or view through URL request as JSON
WLang update to take into account the value from the browser
Small changes on the Footer
Hide the user block when loged in
Updated Note return in WController::hasAccess
Added new lines at end of file
Merge pull request #77 from Creatiwity/theme-grafx

Theme grafx
Removed WNote's display handler

This email has become deprecated since WRetriever. All notes should be
using assign handler by default.
Bug fixes in WNote & WRetriever
Theme _blank loads Bootstrap 3.0.0