Feature: References upgrade (#28)

Author: Martynas Žilinskas

packages/ts-docs-gen/examples/simple/boo.ts

@@ -0,0 +1,31 @@
+export abstract class AbstractBoo {
+    // TODO: Maybe implement default value of property.
+    public readonly abstract DefaultBooMessage: string = "Some string with a BooMessage...";
+
+    constructor() {
+        this.BooMessage = this.DefaultBooMessage;
+    }
+
+    public abstract BooMessage: string;
+
+    public abstract BooTheMessage(): string;
+
+    public abstract AbstractBooMember?: string;
+}
+
+export class Boo extends AbstractBoo {
+    public DefaultBooMessage: string;
+
+    constructor() {
+        super();
+        this.BooMessage += " And more...";
+    }
+
+    public BooMessage: string;
+    public BooTheMessage(): string {
+        return this.BooMessage;
+    }
+
+    // TODO: fix reverted order of union types.
+    public AbstractBooMember?: string | undefined;
+}