Improves notification system

* ICalendarManager.cs: WIP booking TODO a calendar provider

* NpgsqlProfileProvider.cs: Fixes the defaultValue specification from
  config file

* BlogsController.cs:
* AccountController.cs:
* CalendarController.cs: refactoring : the Yavsc controller name

* instdbws.sql: a new profile value : a boolean, `AllowCookies` :'{

* style.css: a class to display notification

* HomeController.cs: Notifies users this site uses cookies (what for
  an information!)
If authenticated, at dimissing this notification, the user's profile
  is updated,
and he'll not mess up anymore with the info.

* App.master:
* YavscHelpers.cs: adds usage of click_action value at
displaying a notification.

* yavsc.js: Implements the notification `click_action`

* Web.config: * enables anonymous profiles
* adds a new `allowcookies` profile property

* Web.csproj: Yavsc controller refactoring

* YaEvent.cs:
* IFreeDateSet.cs: WIP booking

* LocalizedText.resx:
* LocalizedText.fr.resx:
* LocalizedText.Designer.cs:
* LocalizedText.fr.Designer.cs: implements the message "uses cookies"

* YavscModel.csproj: refactoring

* Notification.cs: The Yavsc otification will start as a Google one
  ...
many properties are not yet used, but all seems usefull.

* Web.config: code prettying

* YavscController.cs: Gives Yavsc a concrete base controller

NpgsqlMRPProviders/ChangeLog

@@ -0,0 +1,5 @@
+2015-10-28  Paul Schneider  <paul@pschneider.fr>
+
+	* NpgsqlProfileProvider.cs: Fixes the defaultValue
+	specification from config file
+

NpgsqlMRPProviders/NpgsqlProfileProvider.cs

@@ -221,7 +221,7 @@ namespace Npgsql.Web
 					} else {
 						foreach (SettingsProperty p in collection) {
 							SettingsPropertyValue v = new SettingsPropertyValue (p);
-							v.PropertyValue = null;
+							v.PropertyValue = p.DefaultValue;
 							c.Add (v);
 						}
 					}