Individual watchers have different construction API from index.js entry point

[DavidSouther]

The individual watchers NodeWatcher PollWatcher etc expect to be used with the new operator. The sane function on does that, but switching from var watch = require('sane'); to var watch = require('sane').NodeWatcher; is not a valid transformation. Can the Watcher ctors be made to instantiate themselves, if ! this instanceof Watcher?

[amasad]

I'm not against it if you want to send a PR. Otherwise could easily be:

function watch(dir, options) {
  return new NodeWatcher(dir, options);
}

[DavidSouther]

This came up in a refactor (the one mentioned above) and was unexpected

[amasad]

right, maybe I should keep a changelog or the like.