refact and login

src/Yavsc.Org/ViewModels/Administration/FireViewModel.cs

@@ -8,12 +8,12 @@ namespace Yavsc.ViewModels
         [Display(Name="EnroledLabel", ResourceType=typeof(EnrolerViewModel))]
         public string EnroledUserName { get; set; }
 
-        [YaRequired]
+        [Required]
         public string EnroledUserId { get; set; }
 
 
         [Display(Name="RoleNameLabel", ResourceType=typeof(EnrolerViewModel))]
-        [YaRequired]
+        [Required]
         public string RoleName { get; set; }
     }
-}
+}

src/Yavsc.Org/ViewModels/Gen/PdfGenerationViewModel.cs

@@ -8,11 +8,11 @@ namespace Yavsc.ViewModels.Gen
     public class PdfGenerationViewModel
     {
         
-        [YaRequired]
+        [Required]
         public string TeXSource { get; set; }
-        [YaRequired]
+        [Required]
         public string BaseFileName { get; set; }
-        [YaRequired]
+        [Required]
         public string DestDir { get; set; }
         public bool Generated { get; set; }
         public HtmlString GenerationErrorMessage { get; set; }

src/Yavsc.Org/ViewModels/Manage/SetFullNameViewModel.cs

@@ -6,7 +6,7 @@ namespace Yavsc.ViewModels.Manage
 {
     public class SetFullNameViewModel
     {
-        [YaRequired]
+        [Required]
         [Display(Name = "Your full name"), YaStringLength(512)]
         public string FullName { get; set; }
     }