fixed docs build for newer sphinx releases

CHANGES.rst

@@ -9,150 +9,3 @@ releases or the commit log:
  - https://github.com/WoLpH/python-progressbar/commits/develop
 
 Hint: click on the `...` button to see the change message.
-
-The list below should be the same as the list of releases above but tends to be
-out of date and/or incomplete:
-
-.. changelog::
-    :version: dev
-    :released: Ongoing
-
-    .. change::
-        :tags:  docs
-
-        Updated CHANGES.
-
-.. changelog::
-    :version: 3.15
-    :released: 2017-03-15
-
-    .. change::
-        Large performance improvements
-
-    .. change::
-        Dropped Pypy3 support in Travis tests
-
-    .. change::
-        Improved output redirection (fixed several bugs)
-
-    .. change::
-        Showing N/A when no numbers are available
-
-    .. change::
-        Improved docs
-
-
-.. changelog::
-    :version: 3.5
-    :released: 2015-11-15
-
-    .. change::
-        Added support for size-dependent widgets
-
-    .. change::
-        Fixed inheritance issues
-
-.. changelog::
-    :version: 3.4
-    :released: 2015-11-11
-
-    .. change::
-        Added usage documentation
-
-    .. change::
-        Fixed several bugs including default widths and output redirection
-
-    :version: 3.3
-    :released: 2015-10-12
-
-    .. change::
-        :tags: unknown-length
-
-        Fixed `UnknownLength` handling. Thanks to @takluyver
-
-.. changelog::
-    :version: 3.2
-    :released: 2015-10-11
-
-    .. change::
-        :tags: packaging
-
-        Cookiecutter package
-
-.. changelog::
-    :version: 3.1
-    :released: 2015-07-11
-
-    .. change::
-        :tags: python 3
-
-        Python 3 support
-
-2011-05-15:
-  - Removed parse errors for Python2.4 (no, people *should not* be using it
-    but it is only 3 years old and it does not have that many differences)
-
-  - split up progressbar.py into logical units while maintaining backwards
-    compatability
-
-  - Removed MANIFEST.in because it is no longer needed and it was causing
-    distribute to show warnings
-
-
-2011-05-14:
-  - Changes to directory structure so pip can install from Google Code
-  - Python 3.x related fixes (all examples work on Python 3.1.3)
-  - Added counters, timers, and action bars for iterators with unknown length
-
-2010-08-29:
-  - Refactored some code and made it possible to use a ProgressBar as
-    an iterator (actually as an iterator that is a proxy to another iterator).
-    This simplifies showing a progress bar in a number of cases.
-
-2010-08-15:
-  - Did some minor changes to make it compatible with python 3.
-
-2009-05-31:
-  - Included check for calling start before update.
-
-2009-03-21:
-  - Improved FileTransferSpeed widget, which now supports an unit parameter,
-    defaulting to 'B' for bytes. It will also show B/s, MB/s, etc instead of
-    B/s, M/s, etc.
-
-2009-02-24:
-  - Updated licensing.
-  - Moved examples to separated file.
-  - Improved _need_update() method, which is now as fast as it can be. IOW,
-    no wasted cycles when an update is not needed.
-
-2008-12-22:
-  - Added SimpleProgress widget contributed by Sando Tosi
-    <matrixhasu at gmail.com>.
-
-2006-05-07:
-  - Fixed bug with terminal width in Windows.
-  - Released version 2.2.
-
-2005-12-04:
-  - Autodetection of terminal width.
-  - Added start method.
-  - Released version 2.1.
-
-2005-12-04:
-  - Everything is a widget now!
-  - Released version 2.0.
-
-2005-12-03:
-  - Rewrite using widgets.
-  - Released version 1.0.
-
-2005-06-02:
-  - Rewrite.
-  - Released version 0.5.
-
-2004-06-15:
-  - First version.
-  - Released version 0.1.
-
-.. todo:: vim: set filetype=rst:

setup.py

@@ -84,8 +84,7 @@ def parse_requirements(filename):
         zip_safe=False,
         extras_require={
             'docs': [
-                'changelog',
-                'sphinx>=1.5.0',
+                'sphinx>=1.7.0',
             ],
             'tests': [
                 'flake8',