Added markdown formatting to examples readme

examples/README

 
 Mininet Examples
+========================================================
 
 These examples are intended to help you get started using
 Mininet's Python API.
 
----
+========================================================
 
-baresshd.py:
+### baresshd.py:
 
 This example uses Mininet's medium-level API to create an sshd
 process running in a namespace. Doesn't use OpenFlow.
 
-consoles.py:
+### consoles.py:
 
 This example creates a grid of console windows, one for each node, 
 and allows interaction with and monitoring of each console, including
 graphical monitoring.
 
-controllers.py:
+### controllers.py:
 
 This example creates a network and adds multiple controllers to it.
 
-cpu.py:
+### cpu.py:
 
 This example tests iperf bandwidth for varying CPU limits.
 
-emptynet.py:
+### emptynet.py:
 
 This example demonstrates creating an empty network (i.e. with no
 topology object) and adding nodes to it.
 
-hwintf.py:
+### hwintf.py:
 
 This example shows how to add an interface (for example a real
 hardware interface) to a network after the network is created.
 
-limit.py:
+### limit.py:
 
 This example shows how to use link and CPU limits.
 
-linearbandwidth.py:
+### linearbandwidth.py:
 
 This example shows how to create a custom topology programatically
 by subclassing Topo, and how to run a series of tests on it.
 
-miniedit.py:
+### miniedit.py:
 
 This example demonstrates creating a network via a graphical editor.
 
-multiping.py:
+### multiping.py:
 
 This example demonstrates one method for 
-monitoring output from multiple hosts, using node.monitor().
+monitoring output from multiple hosts, using `node.monitor()`.
 
-multipoll.py:
+### multipoll.py:
 
 This example demonstrates monitoring output files from multiple hosts.
 
-multitest.py:
+### multitest.py:
 
 This example creates a network and runs multiple tests on it.
 
-popen.py:
+### popen.py:
 
-This example monitors a number of hosts using host.popen() and
-pmonitor().
+This example monitors a number of hosts using `host.popen()` and
+`pmonitor()`.
 
-popenpoll.py:
+### popenpoll.py:
 
 This example demonstrates monitoring output from multiple hosts using
-the node.popen() interface (which returns Popen objects) and pmonitor().
+the `node.popen()` interface (which returns Popen objects) and `pmonitor()`.
 
-scratchnet.py, scratchnetuser.py:
+### scratchnet.py, scratchnetuser.py:
 
 These two examples demonstrate how to create a network by using the lowest-
 level Mininet functions. Generally the higher-level API is easier to use,
 but scratchnet shows what is going on behind the scenes.
 
-simpleperf.py:
+### simpleperf.py:
 
 A simple example of configuring network and CPU bandwidth limits.
 
-sshd.py:
+### sshd.py:
 
 This example shows how to run an sshd process in each host, allowing
 you to log in via ssh. This requires connecting the Mininet data network
@@ -89,14 +90,13 @@ to an interface in the root namespace (generaly the control network
 already lives in the root namespace, so it does not need to be explicitly
 connected.)
 
-treeping64.py:
-
-This example creates a 64-host tree network, and attempts to check full
-connectivity using ping, for different switch/datapath types.
-
-tree1024.py:
+### tree1024.py:
 
 This example attempts to create a 1024-host network, and then runs the
 CLI on it. It may run into scalability limits, depending on available
-memory and sysctl configuration (see INSTALL.)
+memory and sysctl configuration (see `INSTALL`.)
 
+### treeping64.py:
+
+This example creates a 64-host tree network, and attempts to check full
+connectivity using ping, for different switch/datapath types.
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