Various Tweaks

Remove rocketeer from being installed globally, this was conflicting with local composer installed
Make sure the timezone is set to be America/Detroit (ran into an issue with the timing of a script and it was off because the server of off)
RVM needs GPG key import for installing

Node, NVM, etc packages updated to the latest stable version as of 12-16-2014
Ok cool. The last few times I built the box the guest additions always said they were out of date. So if that isn't the case anymore that will be good to not have to manually do this.