Added readme syntax

Author: pkittenis

README.md

@@ -6,12 +6,13 @@ Small wrapper library over paramiko that allows for parallel execution of SSH co
 .. image:: https://api.travis-ci.org/pkittenis/parallel-ssh.png?branch=master
         :target: https://travis-ci.org/pkittenis/parallel-ssh
 
-###
 Example
-###
+============
 
+```python
 from pssh import ParallelSSHClient
 hosts = ['myhost1', 'myhost2']
 client = ParallelSSHClient(hosts)
 cmds = client.exec_command('ls -ltrh /tmp/aasdfasdf', sudo = True)
 print [client.get_stdout(cmd) for cmd in cmds]
+```