4.0.0-RC1

Merge all change logs of version 3.1.0.M1, 3.1.0, 3.1.0.1 and 4.0.0.M1. First apache release.

API Changes

1. Adjust persist structure for orchestration's registry center.
2. Adjust Sharding-JDBC configuration API.
3. Change package and maven groupId form io.shardingsphere to org.apache.shardingsphere.
4. Adjust spring-boot-starter.

New Features

1. XA Transaction available.
2. Data encrypt available.
3. Use PostgreSQL protocol access Sharding-Proxy available.
4. DISTINCT SQL syntax available.
5. Broadcast table.
6. All SQL 100% compatible if route to single data node (MySQL Only).

Change Logs

1. MILESTONE #3
2. MILESTONE #4
3. MILESTONE #5
4. MILESTONE #6