Add Aaru as creator for Virtual PC disk images.

Aaru.Images/VHD/Constants.cs

@@ -81,7 +81,10 @@ namespace Aaru.DiscImages
         ///     Created by DiscImageChef, "dic "
         /// </summary>
         const uint CREATOR_DISCIMAGECHEF = 0x64696320;
-
+        /// <summary>
+        ///     Created by Aaru, "aaru"
+        /// </summary>
+        const uint CREATOR_AARU = 0x61617275;
         /// <summary>
         ///     Disk image created by Virtual Server 2004
         /// </summary>

Aaru.Images/VHD/Read.cs

@@ -272,6 +272,14 @@ namespace Aaru.DiscImages
                         $"{(thisFooter.CreatorVersion & 0xFF000000) >> 24}.{(thisFooter.CreatorVersion & 0xFF0000) >> 16}.{(thisFooter.CreatorVersion & 0xFF00) >> 8}.{thisFooter.CreatorVersion & 0xFF}";
                 }
                     break;
+
+                case CREATOR_AARU:
+                {
+                    imageInfo.Application = "Aaru";
+                    imageInfo.ApplicationVersion =
+                        $"{(thisFooter.CreatorVersion & 0xFF000000) >> 24}.{(thisFooter.CreatorVersion & 0xFF0000) >> 16}.{(thisFooter.CreatorVersion & 0xFF00) >> 8}.{thisFooter.CreatorVersion & 0xFF}";
+                }
+                    break;
                 default:
                 {
                     imageInfo.Application =

Aaru.Images/VHD/Write.cs

@@ -187,7 +187,7 @@ namespace Aaru.DiscImages
                 Version  = VERSION1,
                 Timestamp =
                     (uint)(DateTime.Now - new DateTime(2000, 1, 1, 0, 0, 0, DateTimeKind.Utc)).TotalSeconds,
-                CreatorApplication = CREATOR_DISCIMAGECHEF,
+                CreatorApplication = CREATOR_AARU,
                 CreatorVersion =
                     (uint)(((thisVersion.Major & 0xFF) << 24) + ((thisVersion.Minor & 0xFF) << 16) +
                            ((thisVersion.Build & 0xFF) << 8)  + (thisVersion.Revision & 0xFF)),