Add Modifier model

Elwig/Models/Modifier.cs

@@ -0,0 +1,42 @@
+using Microsoft.EntityFrameworkCore;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Elwig.Models {
+    [Table("modifier"), PrimaryKey("Year", "ModId")]
+    public class Modifier {
+        [Column("year")]
+        public int Year { get; set; }
+
+        [Column("modid")]
+        public string ModId { get; set; }
+
+        [Column("name")]
+        public string Name { get; set; }
+
+        [Column("abs")]
+        public long? AbsValue { get; set; }
+
+        [NotMapped]
+        public decimal? Abs {
+            get {
+                return AbsValue != null ? Season.DecFromDb((long)AbsValue) : null;
+            }
+            set {
+                AbsValue = value != null ? Season.DecToDb((decimal)value) : null;
+            }
+        }
+
+        [Column("rel")]
+        public double? Rel { get; set; }
+
+        [Column("standard")]
+        public bool IsStandard { get; set; }
+
+        [Column("quick_select")]
+        public bool IsQuickSelect { get; set; }
+
+        [ForeignKey("Year")]
+        public virtual Season Season { get; private set; }
+
+    }
+}