EiffelStudio Homebrew package.

I've been told to do a PR here although I'm not sure how this would work for end users to get eiffelstudio without fidling with the homebrew configuration.

Thanks,
Manu
Can you add instructions on how to launch it in a caveats method? You can take a look at aws-cloudsearch for an example.

Also, would you be able to adjust the test so it works across CPU types?