kvack lets you watch a specific file path for changes. Because watchers
are tied to paths rather than specific files, they report create and
delete events in addition to modify events.
Usage
var kvack = require('kvack')
, watcher = kvack('/path/to/file')
watcher.on('change', function (event) {
// the event will be either 'create', 'modify' or 'delete'; specific
// events are emitted alongside the general 'change' event
})