Stop nicely when asked to stop
Merge pull request #21 from joshua-rutherford/stop

Stop nicely when asked to stop
Update Changelog and README for pull request #21
Add .bundle to .gitignore
Add Ruby 2.1 to travis ci
CWD replies with 250, not 257.  Closes #18.
Merge pull request #19 from joshua-rutherford/rfc3659

Support MDTM and SIZE commands
Update MDTM to use UTC