Log Message:
Update py-weasyprint to 0.39.

Version 0.39
------------

Released on 2017-06-24.

Bug fixes:

* Fix the use of WeasyPrint's URL fetcher with CairoSVG.

Version 0.38
------------

Released on 2017-06-16.

Bug fixes:

* `#477 <https://github.com/Kozea/WeasyPrint/issues/477>`_:
  Don't crash on font-face's src attributes with local functions.

Version 0.37
------------

Released on 2017-06-15.

WeasyPrint now depends on tinycss2 instead of tinycss.

New features:

* `#437 <https://github.com/Kozea/WeasyPrint/issues/437>`_:
  Support local links in generated PDFs.

Bug fixes:

* `#412 <https://github.com/Kozea/WeasyPrint/issues/412>`_:
  Use a NullHandler log handler when WeasyPrint is used as a library.
* `#417 <https://github.com/Kozea/WeasyPrint/issues/417>`_,
  `#472 <https://github.com/Kozea/WeasyPrint/issues/472>`_:
  Don't crash on some line breaks.
* `#327 <https://github.com/Kozea/WeasyPrint/issues/327>`_:
  Don't crash with replaced elements with height set in percentages.
* `#467 <https://github.com/Kozea/WeasyPrint/issues/467>`_:
  Remove incorrect line breaks.
* `#446 <https://github.com/Kozea/WeasyPrint/pull/446>`_:
  Let the logging module do the string interpolation.