more and better samples for Nu, Racket, Scala

- 99 bottles of beer is more substantial than hello world
 - also fixed chmod 755 on several .script! files

samples/Nu/RandomApp.nu

@@ -0,0 +1,27 @@
+;; main.nu
+;;  Entry point for a Nu program.
+;;
+;;  Copyright (c) 2007 Tim Burks, Neon Design Technology, Inc.
+
+(load "Nu:nu")     ;; basics
+(load "Nu:cocoa")  ;; cocoa definitions
+(load "Nu:menu")   ;; menu generation
+(load "randomapp") ;; Aaron Hillegass' famous example
+
+;; define the application delegate class
+(class ApplicationDelegate is NSObject
+     (imethod (void) applicationDidFinishLaunching: (id) sender is
+          (build-menu default-application-menu "RandomApp")
+          (set $random ((RandomAppWindowController alloc) init))))
+
+;; install the delegate and keep a reference to it since 
+;; the application won't retain it.
+((NSApplication sharedApplication) setDelegate:
+    (set delegate ((ApplicationDelegate alloc) init)))
+
+;; this makes the application window take focus when
+;;  we've started it from the terminal
+((NSApplication sharedApplication) activateIgnoringOtherApps:YES)
+
+;; run the main Cocoa event loop
+(NSApplicationMain 0 nil)