Fix examples to work with new API (and vice-versa.)

examples/README

@@ -6,12 +6,21 @@ Mininet's Python API.
 
 ---
 
+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:
 
 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:
+
+This example creates a network and adds multiple controllers to it.
+
 emptynet.py:
 
 This example demonstrates creating an empty network (i.e. with no
@@ -44,10 +53,10 @@ 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:
+treeping64.py:
 
 This example creates a 64-host tree network, and attempts to check full
-connectivity using ping, for three different switch/datapath types.
+connectivity using ping, for different switch/datapath types.
 
 tree1024.py:
 
@@ -55,7 +64,3 @@ 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.)
 
-udpbwtest.py:
-
-This example shows how to run a test across an entire network, and monitor
-the output of a set of hosts in real time.