Four tempfiles and tempfolders were not being cleaned up every time repo_spec.rb was executed:
```
drwx------   3 smcclellan  staff     102 Mar 18 12:58 razor-repo-test-download20140318-74931-1l4np44
drwx------   3 smcclellan  staff     102 Mar 18 12:58 razor-repo-test-download20140318-74931-1querzl
drwx------   3 smcclellan  staff     102 Mar 18 12:58 razor-repo-test-download20140318-74931-3fyoe
drwx------   3 smcclellan  staff     102 Mar 18 12:58 razor-repo-test-download20140318-74931-6myor9
```
I had a previous version that would delete these files/folders individually, but it's IMO cleaner to just use the repo's destroy method (that method is already tested in a separate unit test as well).