Add TypeScript, generate stations and a line

src/Station.ts

@@ -0,0 +1,11 @@
+export default class Station {
+  public location: PIXI.Point;
+  public population: number;
+  public connections: Station[];
+
+  constructor(location: PIXI.Point, population: number, connections?: Station[]) {
+    this.location = location;
+    this.population = population;
+    this.connections = connections;
+  }
+}