A bit of cleanup, updated the README, started vhost test.

Change-Id: I49b998644b8b79c778c1186fc09831b1cd8fc015
Signed-off-by: John DeNisco <jdenisco@cisco.com>
diff --git a/extras/vpp_config/vpplib/VppPCIUtil.py b/extras/vpp_config/vpplib/VppPCIUtil.py
index 829d66a..591dfab 100644
--- a/extras/vpp_config/vpplib/VppPCIUtil.py
+++ b/extras/vpp_config/vpplib/VppPCIUtil.py
@@ -251,11 +251,12 @@
 
         :param devices: A list of devices
         :param show_interfaces: show the kernel information
+        :param show_header: Display the header if true
         :type devices: dict
         :type show_interfaces: bool
+        :type show_header: bool
         """
 
-
         if show_interfaces:
             header = "{:15} {:25} {:50}".format("PCI ID",
                                                 "Kernel Interface(s)",
@@ -265,8 +266,7 @@
                                           "Description")
         dashseparator = ("-" * (len(header) - 2))
 
-
-        if show_header == True:
+        if show_header is True:
             print header
             print dashseparator
         for dit in devices.items():
@@ -298,7 +298,6 @@
         :type device_id: string
         """
 
-
         rootdir = node['rootdir']
         dpdk_script = rootdir + DPDK_SCRIPT
         cmd = dpdk_script + ' -u ' + ' ' + device_id