How to make Application bundle from Executable? (Mac)

[Gan via Digitalmars-d-learn]

I managed to copy an application bundle and change stuff inside 
it to run my executable, but it was very manual and kinda 
hackish. Also I can't get my application to load images that I 
place in the Resources folder(or any folder in the bundle for 
that matter).

Is there an official way to turn a D executable into a Mac 
Application Bundle?