Make fs.watchFile work (kinda) on windows

watchFile monkey patch.js

var os = require('os');

if (os.platform() == 'win32') {
	// change fs.watchFile so that it doesn't throw an error on windows.
	
	fs.watchFile = function(filepath, callbackfunc) {
		var old = fs.statSync(filepath);
		fs.watch(filepath, function() {
			fs.stat(filepath, function(err, newStat) {
				callbackfunc(old, newStat);
			});
		});
	};
}