rastersize/CDEvents — pull request #20 by uasi (2013-05-16 06:24:24+00:00)
Title: CDEvent should maintain strong references to its properties.

Unretained property is source of headaches:

```objc
- (void)foo {
self.events = [[CDEvents alloc] initWithURLs:URLs
block:^(CDEvents *watcher, CDEvent *event) {
self.lastEvent = event;
}];
}

- (void)bar {
// Remember the URL property is unsafe_unretained.
NSLog(@"%@", self.lastEvent.URL); // BOOM!
}
```