create a patch upgrade

[Sarah Reichelt]

> Is making a patch for a program easy or hard to change minor things on 
> a program that has already been compiled into an exe?
>
> This will be for the user to upgrade without having to dl the whole 
> program.
>
If you have your project built into separate sub-stacks, it is quite 
easy to have a updater program download new versions of the sub-stacks 
only. It isn't exactly patching the app, but it might do what you 
wanted.

Sarah