Improve health of this package (#1409)

* added flake8 and flake8-import-order to travis for py27

* fixed a test that fails from time to time depending on an order of a dict

* flake8 tweaks for the entire codebase excluding tests

tox.ini

@@ -1,6 +1,5 @@
 [tox]
-envlist = {py26,py27,py33,py34,py35,pypy,pypy3}-{mg27,mg28}
-#envlist = {py26,py27,py33,py34,pypy,pypy3}-{mg27,mg28,mg30,mgdev}
+envlist = {py26,py27,py33,py34,py35,pypy,pypy3}-{mg27,mg28},flake8
 
 [testenv]
 commands =
@@ -14,3 +13,10 @@ deps =
 setenv =
     PYTHON_EGG_CACHE = {envdir}/python-eggs
 passenv = windir
+
+[testenv:flake8]
+deps =
+    flake8
+    flake8-import-order
+commands =
+   flake8