Fix two issues with non-ASCII characters being written to byte streams.
* #72: In pngmath, make it possible to give a full path to LaTeX and
  dvipng on Windows.  For that to work, the ``pngmath_latex`` and
  ``pngmath_dvipng`` options are no longer split into command and
  additional arguments; use ``pngmath_latex_args`` and
  ``pngmath_dvipng_args`` to give additional arguments.
Remove duplicate warning.
Fix #67: Output warnings about failed doctests in the doctest extension
even when running in quiet mode.
Prepare for 0.5.1 release.
Added tag 0.5.1 for changeset dfe5aae7c8ad
Post-release updates.
Add SQLAlchemy.
Fix #58: Add extension tutorial and better docs on where to put extensions.
Note how to change default role.
Fix #80: use string.ascii_* constants in case locale.setlocale() is
somehow called which then leads to UnicodeErrors.
* #81: Write environment and search index in a manner that is safe
  from exceptions that occur during dumping.
Switch copyright and license tags to single style.  Add contributor
names in AUTHORS instead, and add the license of etree13 to
LICENSE.
Some more license nits.
Remove debugging print.
fix custom link titles in toctrees
Fix #86; merged from mq
A bit of clarification about where Sphinx finds autodoced modules.
make -Q work
Open literalinclude files in universal newline mode to allow
arbitrary newline conventions.