Add support for Python 3.6 and 3.7.

.travis.yml

@@ -1,6 +1,11 @@
 language: python
 python:
     - 2.7
+    - 3.6
+matrix:
+    include:
+        - python: 3.7
+          dist: xenial
 install:
     - pip install -U pip setuptools
     - pip install -U coverage coveralls zope.testrunner

CHANGES.rst

@@ -2,11 +2,13 @@ Changes
 =======
 
 
-0.6 (unreleased)
+1.0 (unreleased)
 ----------------
 
 - Update tests to `zope.testbrowser >= 5`.
 
+- Add support for Python 3.6 and 3.7.
+
 
 0.5 (2013-03-09)
 ----------------

setup.py

@@ -25,7 +25,7 @@ def read(path):
 
 setup(
     name='z3c.preference',
-    version='0.6.dev0',
+    version='1.0.dev0',
     author="Michael Howitz",
     author_email="zope-dev@zope.org",
     description="UI for zope.preference using z3c.pagelet and z3c.form.",
@@ -40,18 +40,26 @@ def read(path):
     license="ZPL 2.1",
     keywords="zope3 bluebream z3c preference ui",
     classifiers=[
-        'Development Status :: 3 - Alpha',
+        'Development Status :: 3 - Beta',
         'Environment :: Web Environment',
+        'Framework :: Zope :: 3'
         'Intended Audience :: Developers',
-        'License :: OSI Approved',
         'License :: OSI Approved :: Zope Public License',
-        'Programming Language :: Python',
+        'License :: OSI Approved',
         'Natural Language :: English',
         'Operating System :: OS Independent',
+        'Programming Language :: Python :: 2',
+        'Programming Language :: Python :: 2.7',
+        'Programming Language :: Python :: 3',
+        'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3.7',
+        'Programming Language :: Python :: Implementation :: CPython',
+        'Programming Language :: Python :: Implementation',
+        'Programming Language :: Python',
+        'Programming Language :: Python',
         'Topic :: Internet :: WWW/HTTP',
-        'Framework :: Zope :: 3'
     ],
-    url='http://pypi.python.org/pypi/z3c.preference',
+    url='https://github.com/zopefoundation/z3c.preference',
     packages=find_packages('src'),
     include_package_data=True,
     package_dir={'': 'src'},

src/z3c/preference/categories.rst

@@ -93,7 +93,7 @@ the preferences are stored in the principal annotations:
 The form displays the titles and descriptions of the categories:
 
 >>> browser.open('http://localhost/++preferences++/app')
->>> print browser.contents
+>>> print(browser.contents)
 <!DOCTYPE ...
 ...General Settings...
 ...Settings for the whole app...

tox.ini

@@ -2,6 +2,8 @@
 envlist =
     flake8,
     py27,
+    py36,
+    py37,
     coverage,
 
 [testenv]
@@ -13,7 +15,7 @@ deps =
     zope.testrunner
 
 [testenv:coverage]
-basepython = python2.7
+basepython = python3.7
 commands =
     coverage run -m zope.testrunner --test-path=src []
     coverage report --fail-under=93