added sfloader for file uploads.

Models/GasRecord/GasRecordImport.cs

@@ -0,0 +1,10 @@
+namespace CarCareTracker.Models
+{
+    public class GasRecordImport
+    {
+        public DateTime Date { get; set; }
+        public int Odometer { get; set; }
+        public decimal FuelConsumed { get; set; }
+        public decimal Cost { get; set; }
+    }
+}