Drop Python3.2 support.

`pip`, `wheel` and other fundamental helpers dropped or are going
to drop py3.2. It makes no sense to stick with it.

CHANGES.rst

@@ -8,6 +8,8 @@ Changes
 - Added new english wordlist ``en_securedrop``. This is the new
   default list. Thanks to `heartsucker
   <https://github.com/heartsucker>`_ who compiled and added the list.
+- Remove support for Python 3.2. Several packages we depend on for testing
+  and sandboxing stopped Python 3.2 support. We follow them.
 
 
 0.6.1 (2015-12-15)

setup.py

@@ -71,7 +71,6 @@ setup(
         "Programming Language :: Python :: 2.6",
         "Programming Language :: Python :: 2.7",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.2",
         "Programming Language :: Python :: 3.3",
         "Programming Language :: Python :: 3.4",
         "Programming Language :: Python :: 3.5",

tox.ini

 [tox]
-envlist = flake8, pypy, py26, py27, py32, py33, py34, py35, coverage
+envlist = flake8, pypy, py26, py27, py33, py34, py35, coverage
 
 [testenv]
 usedevelop=True