[MacRuby-devel] Mac App Store Submission question

Hi all, in the Mac App Store Submission github page one finds the following paragraph "An example might be something like this:--compile --embed --gem httparty --gem json_pure --codesign "3rd Party Mac Developer Application: Daniel Westendorf". This example will compile your source into .rbo files (instead of .rb files, don't let anyone steal your code!)" What are those .rbo files ? My application is heavily dependent on metaprogramming. Will it work as a compiled .rbo file? Thanks, David Kramf