Pre-upgrade for pip and setuptools for CI

.travis.yml

@@ -9,8 +9,7 @@ env:
     - TOX_ENV=py27
 
 install:
-    - pip install -U pip setuptools
-    - pip install tox
+    - pip install -U pip setuptools tox
 
 script:
     - tox -e $TOX_ENV

circle.yml

@@ -7,13 +7,15 @@ machine:
         TOX_ENV: py26
         TOX_ENV: py27
 
+    pre:
+        - pip install -U pip setuptools
+
 checkout:
     post:
         - git submodule update --init
 
 dependencies:
     pre:
-        - pip install -U pip setuptools
         - pip install tox
 
 test: