Added donor

ref #11

src/models/Donor.ts

@@ -0,0 +1,17 @@
+import { Entity, Column } from "typeorm";
+import { IsBoolean } from "class-validator";
+import { Participant } from "./Participant";
+
+/**
+ * Defines a donor.
+*/
+@Entity()
+export class Donor extends Participant {
+  /**
+   * Does this donor need a receipt?.
+   * Default: True
+   */
+  @Column()
+  @IsBoolean()
+  receiptNeeded = false;
+}