Remove XCode project cruft.
Basically a hack on v2.1.0 to move the external command tool processing
sources into the main application, providing easy access to things like
[NSWorkspace sharedWorkspace]. The idea is to migrate away from legacy
code and remove the need for some of the security exceptions previously
required, without having to move wholesale to entirely new IPC APIs.

Released as a test 2.1.1 build in response to e-mail enquiries, though
this is not an "official" 2.1.1 release.
Merge branch 'master' of https://github.com/pond/add_folder_icons