Nettoyages et refactorisations.

* ITitle.cs:
* RssFeeds.cs:
* Blog.cs:
* BasePost.cs:
* YaEvent.cs:
* Estimate.cs:
* BaseEvent.cs:
* Activity.cs:
* UTBlogEntryCollection.cs:
* UUTBlogEntryCollection.cs: refactorisation: Les titres obtiennent
  une interface logicielle dédiée.

* ErrorHtmlFormatter.cs: Pour note: conception à revoir

* PerformerProfile.cs: refactorisation: Les identifiant deviennent
  génériques

* IRating.cs:
* IComment.cs:
* IIdentified.cs: refactorisation: Les identifiant et commentaires
  deviennent génériques

* ITagBackup.cs: refactorisation: un meilleur nom pour cette interface
  qui n'a pas encore d'implementeur.

* UserNameBase.cs: xml doc

* UserSkill.cs:
* UserSkillComment.cs: Les commentaire deviennent génériques

* OtherWebException.cs: classe obsolete

* ViewRenderer.cs: classe obsolète

* YavscModel.csproj: nettoyages de classes obsoletes, ajout des
  nouvelles interfaces et de la classe de base implementant l'
  "activité".

yavscModel/Calendar/BaseEvent.cs

@@ -0,0 +1,70 @@
+//
+//  BaseEvent.cs
+//
+//  Author:
+//       Paul Schneider <paul@pschneider.fr>
+//
+//  Copyright (c) 2015 GNU GPL
+//
+//  This program is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU Lesser General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU Lesser General Public License for more details.
+//
+//  You should have received a copy of the GNU Lesser General Public License
+//  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+using System;
+using System.Web.Http;
+using System.ComponentModel.DataAnnotations;
+using Yavsc.Model;
+
+namespace Yavsc.Model.Calendar
+{
+	/// <summary>
+	/// Base event.
+	/// </summary>
+	public class BaseEvent: ITitle
+	{
+		/// <summary>
+		/// The title.
+		/// </summary>
+		[Required(ErrorMessage="Please, choose a .")] 
+		[Display(ResourceType=typeof(LocalizedText),Name="Title")]
+		public string Title { get; set; }
+		/// <summary>
+		/// The description.
+		/// </summary>
+		[Required(ErrorMessage="Please, choose a Description.")] 
+		[Display(ResourceType=typeof(LocalizedText),Name="Description")]
+		public string Description { get; set; }
+
+		/// <summary>
+		/// The location.
+		/// </summary>
+		[Required(ErrorMessage="Please, choose a Location.")] 
+		[Display(ResourceType=typeof(LocalizedText),Name="Location")]
+		public Position Location { get; set; }
+		/// <summary>
+		/// The start date.
+		/// </summary>
+		[Required(ErrorMessage="Please, choose a Start Date.")] 
+		[Display(ResourceType=typeof(LocalizedText),Name="StartDate")]
+		public DateTime StartDate { get; set; }
+
+		/// <summary>
+		/// Gets or sets the end date.
+		/// </summary>
+		/// <value>The end date.</value>
+		[Required(ErrorMessage="Please, choose an End Date.")] 
+		[Display(ResourceType=typeof(LocalizedText),Name="EndDate")]
+		public DateTime EndDate { get; set; }
+
+	}
+	
+}