Milestone 9p Synchronous File System

Migrate the system from a socket server model to a 9p (from plan 9 OS) synchronous file system. Client systems can then mount the system control files into the root file system. This will allow relatively simple modules to be created that report the data from sensors/actuators and control the cart. This portion of the development does not deal specifically with the content of the files, but rather the file server application and the access API.