Add py34 to readme, pkg metadata, and envlist

This commit adds references explaining the current state of python 3.4
and tempest to the readme, pkg metadata, and adds an etry to the tox
envlist for running the unit tests on python 3.4.

Change-Id: I9c1e3cdf53dbae723a9fee67ad96932709d2305f
diff --git a/setup.cfg b/setup.cfg
index 2de9f34..30d9f25 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -15,6 +15,8 @@
     Programming Language :: Python
     Programming Language :: Python :: 2
     Programming Language :: Python :: 2.7
+    Programming Language :: Python :: 3
+    Programming Language :: Python :: 3.4
 
 [entry_points]
 console_scripts =