One of the big things in OS X Mountain Lion is how the system handles sleeping and sleeping events. For example, Power Nap means that now, Push Notifications still work when the lid is shut provided that the system is connected to a power source. This ties into Notification Center, how the system displays those Push Notifications to users. Sure, there’s tons of fun stuff for Accessibility, Calendar, contacts, Preview, Messages, Gatekeeper, etc. But a substantial underpinning that changed is how sleep is managed. And the handling of sleep extends to the command line. This manifests itself in a very easy to use command line utility called caffeinate. Ironically, caffeinate…