Watcher rewrite and updates

[radovskyb (Benjamin Radovsky)]

radovskyb/watcher

A lot of Watcher has now been rewritten and now contains better/cleaner code.

API Changes

• Instead of adding and removing directories recursively by default or passing options to specify to watch non-recursively, there are now 2 cleaner methods for each, Add + AddRecursive and Remove + RemoveRecursive.
• There’s also no longer the need to choose whether to ignore hidden files or not as an option, as there’s a new IgnoreHiddenFiles method instead.
• Rename and Move events now return the path (Event.Path) in the format of oldPath -> newPath.

New

• Close method to stop the watcher, as well as clearing the watched file’s list.
• Closed channel to listen for when the watcher is closed, used to break out of the main polling goroutine loop, preventing any goroutine leaks.
• Added Move Event.
• Event filtering to specify what events to receive on the Event channel. For example, choosing only to receive Rename or Move events.