enable csv imports for all pages.

Models/GasRecord/GasRecordImport.cs

@@ -1,10 +0,0 @@
-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; }
-    }
-}

Models/ImportModels.cs

@@ -0,0 +1,34 @@
+namespace CarCareTracker.Models
+{
+    /// <summary>
+    /// Import model used for importing Gas records.
+    /// </summary>
+    public class GasRecordImport
+    {
+        public DateTime Date { get; set; }
+        public int Odometer { get; set; }
+        public decimal FuelConsumed { get; set; }
+        public decimal Cost { get; set; }
+    }
+    /// <summary>
+    /// Import model used for importing Service and Repair records.
+    /// </summary>
+    public class ServiceRecordImport
+    {
+        public DateTime Date { get; set; }
+        public int Odometer { get; set; }
+        public string Description { get; set; }
+        public string Notes { get; set; }
+        public decimal Cost { get; set; }
+    }
+    /// <summary>
+    /// Import model used for importing tax records.
+    /// </summary>
+    public class TaxRecordImport
+    {
+        public DateTime Date { get; set; }
+        public string Description { get; set; }
+        public string Notes { get; set; }
+        public decimal Cost { get; set; }
+    }
+}