Updated Hadoop versions

Author: drelu

README.md

@@ -8,6 +8,8 @@ Webhdfs-py has no further dependencies and solely relies on the Python standard
 
 ## Hadoop configuration
 
+Supported Hadoop version: 2.x (including 2.4). Tested with HDP 2.1
+
 Ensure that WebHDFS is enabled in the `hdfs-site.xml`:
 
 Relevant properties:
@@ -22,4 +24,4 @@ see <http://hadoop.apache.org/docs/stable/hadoop-project-dist/hadoop-hdfs/WebHDF
 
 ## Limitations
 
-	* Kerberos security not supported
+	* Kerberos security not supported