OSX watchr stops working

[zivester]

Investigate files that stop being watched, specifically on OSX.

nsyncer: error: { [Error: EMFILE, readdir '/Users/sam/src']
  errno: 20,
  code: 'EMFILE',
  path: '/Users/sam/src' }

node.js:0
// Copyright Joyent, Inc. and other Node contributors.
^
RangeError: Maximum call stack size exceeded

Possibly related to nodejs/node-v0.x-archive#2479 (comment)