version 0.4

• The parser now falls back on pure Python mode if C extensions cannot be
  built. This fixes an issue that prevented some Windows users from installing
  the parser.
• Added support for parsing wikicode tables (patches by David Winegar).
• Added a script to test for memory leaks in scripts/memtest.py.
• Added a script to do releases in scripts/release.sh.
• skip_style_tags can now be passed to mwparserfromhell.parse() (previously,
  only Parser().parse() allowed it).
• The recursive argument to Wikicode's filter methods now accepts a third
  option, RECURSE_OTHERS, which recurses over all children except instances of
  forcetype (for example, code.filter_templates(code.RECURSE_OTHERS)
  returns all un-nested templates).
• The parser now understands HTML tag attributes quoted with single quotes.
  When setting a tag attribute's value, quotes will be added if necessary. As
  part of this, Attribute's quoted attribute has been changed to quotes,
  and is now either a string or None.
• Calling Template.remove() with a Parameter object that is not part of the
  template now raises ValueError instead of doing nothing.
• Parameters with non-integer keys can no longer be created with
  showkey=False, nor have the value of this attribute be set to False later.
• _ListProxy.destroy() has been changed to _ListProxy.detach(), and now works
  in a more useful way.
• If something goes wrong while parsing, ParserError will now be raised.
  Previously, the parser would produce an unclear BadRoute exception or allow
  an incorrect node tree to be build.
• Fixed parser bugs involving:
  • nested tags;
  • comments in template names;
  • tags inside of <nowiki> tags.
• Added tests to ensure that parsed trees convert back to wikicode without
  unintentional modifications.
• Added support for a NOWEB environment variable, which disables a unit test
  that makes a web call.
• Test coverage has been improved, and some minor related bugs have been fixed.
• Updated and fixed some documentation.