MacRuby compilation step fixes

Just a note, mostly to myself: The default XCode MacRuby rb_main.rb template will contain these lines:

Dir.entries(dir_path).each do |path|
  if path != File.basename(__FILE__) && path.match(/\.rb$/)
    require(path)
  end
end

Works fine for uncompiled files, but when you want to compile your app, there’ll be no *.rb files — just *.rbo files. So rb_main.rb needs to be adjusted.

Dir.entries(dir_path).each do |path|
  if path != File.basename(__FILE__) && path.match(/\.rbo?$/)
    require(path)
  end
end

I just spent 15 minutes wondering about these Unknown class 'Controller', using 'NSObject' instead. Encountered in Interface Builder file at path … in my system log, and I tend to forget this kind of detail so I wanted to jot it down as a reminder to future Carlo.

So, listen up, future Carlo. This is important.