Package maintenance

- check out Zope2 dependency until there's a 4.0a5 release
- move Zope2 dependency up
- note Python 3 compatibility in package classifiers
- add Python 3 to travis config

.travis.yml

@@ -2,6 +2,9 @@ language: python
 sudo: false
 python:
     - 2.7
+    - 3.4
+    - 3.5
+    - 3.6
 install:
     - python bootstrap.py
     - bin/buildout

CHANGES.rst

@@ -4,6 +4,8 @@ Changelog
 4.0 (unreleased)
 ----------------
 
+- Python 3 compatibility
+
 - Update to require and be compatible with Zope 4.
 
 3.0 (2016-07-18)

buildout.cfg

@@ -1,7 +1,16 @@
 [buildout]
-extends = https://raw.githubusercontent.com/zopefoundation/Zope/master/versions.cfg
+extensions =
+    mr.developer
+extends = 
+    https://raw.githubusercontent.com/zopefoundation/Zope/master/sources.cfg
+    https://raw.githubusercontent.com/zopefoundation/Zope/master/versions.cfg
 develop = .
 parts = interpreter test
+auto-checkout =
+    Zope2
+
+[sources]
+Zope2 = git ${remotes:github}/Zope pushurl=${remotes:github_push}/Zope
 
 [versions]
 Products.BTreeFolder2 =

setup.py

@@ -33,9 +33,14 @@
           "License :: OSI Approved :: Zope Public License",
           "Operating System :: OS Independent",
           "Programming Language :: Python",
-          "Programming Language :: Python :: 2 :: Only",
+          "Programming Language :: Python :: 2",
           "Programming Language :: Python :: 2.7",
+          "Programming Language :: Python :: 3",
+          "Programming Language :: Python :: 3.4",
+          "Programming Language :: Python :: 3.5",
+          "Programming Language :: Python :: 3.6",
           "Programming Language :: Python :: Implementation :: CPython",
+          "Programming Language :: Python :: Implementation :: PyPy",
       ],
       install_requires=[
           'setuptools',
@@ -45,7 +50,7 @@
           'ExtensionClass>=4.1a1',
           'Persistence',
           'six',
-          'Zope2 >= 4.0a1',
+          'Zope2 > 4.0a4',
           'zope.container',
           'zope.event',
           'zope.lifecycleevent',