VFS Was constantly crashing for one user because they didn't have $HOME set in their workspace. The VFS error is:
```
2017-02-22T15:27:19Z { message: 'Scheduling process exit\nVFS Exception in function \'connect\':\n TypeError: Path must be a string. Received undefined\n at assertPath (path.js:8:11)\n at Object.posix.resolve (path.js:426:5)\n at getProjectWD (eval at t ([eval]:1:364), <anonymous>:83:17)\n at initSocket (eval at t ([eval]:1:364), <anonymous>:2925:21)\n at Object.connect (eval at t ([eval]:1:364), <anonymous>:3126:9)\n at Domain.eval (eval at t ([eval]:1:364), <anonymous>:4964:30)\n at Domain.run (domain.js:228:14)\n at Object.api.(anonymous function) [as connect] (eval at t ([eval]:1:364), <anonymous>:4963:23)\n at Worker.call (eval at t ([eval]:1:364), <anonymous>:7909:21)\n at Worker.Agent._onMessage (eval at t ([eval]:1:364), <anonymous>:3879:8)\nScheduling process exit\n',
pid: 4382802 }
2017-02-22T15:27:19Z VFS stderr [4382802]: VFS Exception in function 'connect':
TypeError: Path must be a string. Received undefined
at assertPath (path.js:8:11)
at Object.posix.resolve (path.js:426:5)
at getProjectWD (eval at t ([eval]:1:364), <anonymous>:83:17)
at initSocket (eval at t ([eval]:1:364), <anonymous>:2925:21)
at Object.connect (eval at t ([eval]:1:364), <anonymous>:3126:9)
at Domain.eval (eval at t ([eval]:1:364), <anonymous>:4964:30)
at Domain.run (domain.js:228:14)
at Object.api.(anonymous function) [as connect] (eval at t ([eval]:1:364), <anonymous>:4963:23)
at Worker.call (eval at t ([eval]:1:364), <anonymous>:7909:21)
at Worker.Agent._onMessage (eval at t ([eval]:1:364), <anonymous>:3879:8)
```
This fixes this bug so collab no longer crashes.
