Fence code blocks in README with languages.

README.md

@@ -48,6 +48,7 @@ You can download the latest build at:
 
 Or use it as a maven dependency:
 
+```xml
 <dependency>
     <groupId>redis.clients</groupId>
     <artifactId>jedis</artifactId>
@@ -55,13 +56,15 @@ Or use it as a maven dependency:
     <type>jar</type>
     <scope>compile</scope>
 </dependency>
-
+```
 
 To use it just:
     
+```java
 Jedis jedis = new Jedis("localhost");
 jedis.set("foo", "bar");
 String value = jedis.get("foo");
+```
 
 For more usage examples check the tests.