News App Controller modified to return Model
WMain - Exec architecture changed

- Controller returns a model
- Model sent to View
- View rendering triggered in WMain::exec()
- Auto-loading of View and Model
First implementation of WRetriever
Added WResponse and code reorganized
WTemplate deleted
Added WTemplate as a sub git project
Cleaning and more security in the architecture

Apps View don't call obsolete self::render() anymore
Cleaned WView and fixed errors management
Bug fixes in Notes management

Uses the View architecture in Notes
New architecture working in Admin + bug fixes for notes
Admin Controller returns the model
WResponse and WView - Headers and Theme management
News app now working with new View architecture
App User updated for new View architecture
News - comments and variables renamed
Merge remote-tracking branch 'origin/master' into WRetriver

Conflicts:
	apps/admin/front/main.php
	apps/user/admin/main.php
	system/WTemplate
	system/WTemplate/WTemplate.php
	system/WTemplate/WTemplateCompiler.php
	system/WTemplate/WTemplateFile.php
	system/WTemplate/WTemplateParser.php
Renamed admin-theme as admin-bootstrap
Prevent error from chmod modif #59
Update default configuration
Fixed comments in WLang