Compile any files that each launcher depends on within the launcher .exe and extract them to a temporary place if needed

[bmcclure]

Files that a launcher might depend on, such as a shortcut file or an external .exe tool, should optionally be able to be included within the build launcher .exe itself and extracted upon use (and then deleted afterward).

This will help to keep the launchers more portable and there won't need to be a shared place where all launcher resources are kept.