Fence code blocks in README with languages.

README.md

@@ -48,20 +48,23 @@ You can download the latest build at:
 
 Or use it as a maven dependency:
 
-    <dependency>
+```xml
+<dependency>
     <groupId>redis.clients</groupId>
     <artifactId>jedis</artifactId>
     <version>2.0.0</version>
     <type>jar</type>
     <scope>compile</scope>
-    </dependency>
+</dependency>
-
+```
 
 To use it just:
     
-    Jedis jedis = new Jedis("localhost");
+```java
-    jedis.set("foo", "bar");
+Jedis jedis = new Jedis("localhost");
-    String value = jedis.get("foo");
+jedis.set("foo", "bar");
+String value = jedis.get("foo");
+```
 
 For more usage examples check the tests.