Coding Guidelines

[jasonsuzhou]

According to 《Alibaba Java Coding Guidelines》, the interface should not have the public modifier.
e.g.
com.alibaba.nacos.api.config.ConfigService.java

public interface ConfigService {

	public String getConfig(String dataId, String group, long timeoutMs) throws NacosException;

	public void addListener(String dataId, String group, Listener listener) throws NacosException;

	public boolean publishConfig(String dataId, String group, String content) throws NacosException;

	public boolean removeConfig(String dataId, String group) throws NacosException;

	public void removeListener(String dataId, String group, Listener listener);

}

[yanlinly]

I fix it in 0.4.0, thx !