Sugar for the command line tool.
No longer require appPath to be defined in user apps.  Uses process.cwd().  Also supports basic usage declaration when a naked [32minfo[39m: Welcome to Sails!

Usage: sails <command>

sails lift		Run this Sails app (in the current dir)
sails <newApp>		Create a new Sails project in the current dir
sails generate <foo>	Generate model and controller for this app
sails version		Get the current globally installed Sails version   is entered, and allows use of a new cmdline tool method: sails lift.  sails lift starts the app whose folder you're in.  sails l, sails s, sails start, sails run, sails server, and sails launch also work