This removes the dependency on the `kuroko` gem and uses the Vagrant command line application to control the virtual environment. The `vagrant` command should be in your path, but if it isn't the path can be set with the `VAGRANT_BIN` environment variable. This may even work on older versions of Vagrant, but they are untested. The `VagrantHelpers` module was added to mimic some of the API that was provided by `kuroko`. The `RemoteCommandHelpers` module was modified to accommodate those changes. Any non-zero exit status on a remote command will raise a `VagrantHelpers::VagrantSSHCommandError` and should be expected by any tests using the command helpers. All existing tests work as expected. In addition, a couple of minor changes were made. The TestApp utilizes the Pathname library but does not require it. This was causing the suite to fail for me so I added an explicit require. Also, the test for the existence of a release directory would give a false positive on subsequent runs if the `KEEP_RUNNING` option was used. I added an `at_exit` that removes the test deployment directory to clean up the box for the next run. Documentation was also added to the README for how to run the test suites.