If you clone the project and try to start the app, it'll fail with:
No such file or directory @ rb_sysopen - /Users/nickcharlton/projects/administrate/tmp/pids/server.pid (Errno::ENOENT)
Rails doesn't seem to be able to create this path (perhaps because it's
really running spec/example_app
?) so let's just make sure it's there
already.