sync: Update your local copy of fly

Occasionally we add additional features to fly or make changes to the communiction between it and Concourse's API server. To make sure you're running the latest and greatest version that works with the Concourse you are targeting we provide a command called sync that will update your local fly. It can be used like so:

$ fly -t example sync

If you see anything odd, for example the output of builds not rendering or certain commands throwing errors, be sure to run this command before investigating any further; it's pretty likely that something has changed with the API, especially while we're pre-1.0.