Added readline function, started work on shops, added some comments, made main menu and a bit of the start.

files/shops.js

@@ -0,0 +1,39 @@
+const readline = require('readline-sync');
+const variables = require("./variables");
+
+module.exports = {
+    ravenRock,
+    vaultZero,
+    newVegas,
+    eureka,
+    trader,
+}
+
+// Inventories for the various shops
+var rrInv = [];
+var vt0Inv = [];
+var vegasInv = []; // A mix of gunrunners, mick&ralphs, and followers
+var eurInv = [];
+var trader1Inv = [];
+var trader2Inv = [];
+var trader3Inv = [];
+
+function ravenRock() {
+    // purchasing code
+}
+
+function vaultZero() {
+    // purchasing code
+}
+
+function newVegas() { 
+    // purchasing code
+}
+
+function eureka() {
+    // purchasing code
+}
+
+function trader() { // One of the 3 trader inventories, chosen randomly
+    // purchasing code
+}