add README

README.md

@@ -0,0 +1,19 @@
+# Flink Connector Redis
+
+forked from org.apache.bahir:flink-connector-redis_2.11:1.0
+
+test on JDK8, flink 1.4.2
+
+```
+<dependency>
+  <groupId>com.github.yang69</groupId>
+  <artifactId>flink-connector-redis_2.11</artifactId>
+  <version>1.0</version>
+</dependency>
+```
+
+# Change Log | 更改日志
+
+1.0 add support for SETEX, as a result, you will need to implement getSecondsFromData(), which returns the expire seconds for the key.
+
+1.0 增加了对 SETEX 的支持，需要实现 getSecondsFromData() 方法，该方法返回期望设置的过期时间（单位为秒）