Add option to install via build number/code

[phillipthelen]

xcodes list already includes the build code in (). when wanting to uninstall a Release candidate version, copying that number was easier than copying/typing the longer name of the release. Unfortunately xcodes said there was no version called that. Since the build codes are unique, it would be nice if the build code could be used as well for commands referencing a specific version.

i.e.
xcodes install 16C5032a

[phillipthelen]

Nevermind, I missed that there already is a PR #232