WDate implementation

WityCMS handles timezone for PHP and MySQL
Fixed bootstrap-responsive on Admin theme & span12 used in _blank theme
Simplified theme/_blank and note_plain.css

Bootstrap grid structure was not needed
Merge pull request #74 from Creatiwity/WDate

WDate implementation
Fixed last commit on WRoute
Fixes some comments on WDate
Fixes bootstrap-responsive.css that was removed
Installer now displays a debug message. fixes #69
Initialization message removed.
Some little changes on installer
Better exception management for WTemplate cache dir problem
Bootstrap 3 and IE compatiblity libraries added
Uses html5shiv from local libraries in _blank and admin-bootstrap
Fixed bugs with Notes and Retriever

Removed a useless function in WNote
Cosmetic changes in WRetriever
Fixes <strong> markup in News/lang files
Cleaning on _blank and admin-bootstrap themes
Updates WTemplate
Merge remote-tracking branch 'origin/0.4' into response-model

Conflicts:
	system/WCore/WMain.php
	system/WCore/WRoute.php