Add pypy to tox by default.

gsnedders · gsnedders · commit e93429e30364 · 2013-05-17T12:54:26.000+01:00
It's quite probable fewer people will have PyPy installed, but I
doubt many will have four versions of CPython installed either.
diff --git a/tox.ini b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py26,py27,py32,py33
+envlist = py26,py27,py32,py33,pypy
 
 [testenv]
 deps =
