Upgrading pp and installing setuptools before each tox jobs

tox.ini

@@ -9,6 +9,8 @@ setenv =
 
 usedevelop = true
 commands =
+    pip install -U pip
+    pip install -U setuptools
     pip install -Ue {toxinidir}[testing]
     {toxinidir}/src/memopol/bin/install_client_deps.sh
     py.test src/