Test errors with Python 3

Coming back to the `asv` repo after a few months and doing a `git pull` and `python setup.py test` I get these errors on Mac with Python 3.4:
https://gist.github.com/cdeil/f3cae75a7113e8331143

In a fresh checkout I only see this one error:
https://gist.github.com/cdeil/3d44790fce3d337513da

An very minor point is that I get this whitespace diff all the time ... maybe simply commit the updated version to get rid of it?
```
$ git diff .
diff --git a/test/asv-machine.json b/test/asv-machine.json
index eb81396..d877683 100644
--- a/test/asv-machine.json
+++ b/test/asv-machine.json
@@ -1,10 +1,10 @@
 {
     "orangutan": {
-        "arch": "x86_64", 
-        "cpu": "Blazingly fast", 
-        "machine": "orangutan", 
-        "os": "GNU/Linux", 
+        "arch": "x86_64",
+        "cpu": "Blazingly fast",
+        "machine": "orangutan",
+        "os": "GNU/Linux",
         "ram": "128GB"
-    }, 
+    },
     "version": 1
 }
\ No newline at end of file
```