Device dialog - Added input remapping for keyboards

Device dialog - Display layout author, if I missed anyone let me know!

src/Artemis.Storage/Entities/Surface/DeviceEntity.cs

@@ -7,6 +7,7 @@ namespace Artemis.Storage.Entities.Surface
         public DeviceEntity()
         {
             InputIdentifiers = new List<DeviceInputIdentifierEntity>();
+            InputMappings = new List<InputMappingEntity>();
         }
         
         public string Id { get; set; }
@@ -25,9 +26,16 @@ namespace Artemis.Storage.Entities.Surface
         public string CustomLayoutPath { get; set; }
 
         public List<DeviceInputIdentifierEntity> InputIdentifiers { get; set; }
+        public List<InputMappingEntity> InputMappings { get; set; }
         
     }
 
+    public class InputMappingEntity
+    {
+        public int OriginalLedId { get; set; }
+        public int MappedLedId { get; set; }
+    }
+
     public class DeviceInputIdentifierEntity
     {
         public string InputProvider { get; set; }