ZK-1931/javazab — pull request #134 by EasonLiao (2014-08-18 21:20:42+00:00)
Title: combine clusterChange and leading/following callbacks?

Right now we call clusterChange and leading/following callbacks separately. Maybe it's cleaner to combine these callbacks:

```
void following(String leader, Set clusterMembers);
void leading(Set activeFollowers, Set clusterMEmbers);
```