testWatch() Fails on First Run

[nvzqz]

When testing FileKit, testWatch() will sometimes fail on the first attempt. I'm not familiar with GCD, so I don't necessarily know why this occurs.

[phimage]

ok, I will do some tests when I have access to a mac computer

Just for information on OSX this is not a GCD implementation but a file system event one
(on the contrary, GCD is used in PR #20)

[nvzqz]

I just figured it used GCD since it uses dispatch queues.

[ijumps]

Fail on the first time because the watch call the delegate when a create event happens. I fix this to support call a block. After create the file, the watcher then watch the path itself, not happend the first time because the path not exists. If you want to monitor other events, maybe call sleep(1) after you create the file. Create and write files happen so quick, so maybe only create event could be catched. Or find a better way to monitor a create event.