rewrite registry module
Merge branch 'master' of https://github.com/jremoting/jremoting.git

Conflicts:
	jremoting-core/src/main/java/com/github/jremoting/core/Invoke.java
	jremoting-core/src/main/java/com/github/jremoting/core/Registry.java
	jremoting-core/src/main/java/com/github/jremoting/core/RegistryListener.java
	jremoting-core/src/main/java/com/github/jremoting/core/ServiceParticipant.java
	jremoting-core/src/main/java/com/github/jremoting/registry/AbstractRegistryWrapper.java
	jremoting-core/src/main/java/com/github/jremoting/registry/CacheRegistryWrapper.java
	jremoting-core/src/main/java/com/github/jremoting/registry/GroupRegistryWrapper.java
	jremoting-core/src/main/java/com/github/jremoting/registry/ZookeeperRegistry.java