• Added support for Python 2.6 and 3.4.
• Template.has() is now passed ignore_empty=False by default instead of True.
  This fixes a bug when adding parameters to templates with empty fields, and
  is a breaking change if you rely on the default behavior.
• The matches argument of Wikicode's filter methods now accepts a function
  (taking one argument, a Node, and returning a bool) in addition to a regex.
• Re-added flat argument to Wikicode.get_sections(), fixed the order in which
  it returns sections, and made it faster.
• Wikicode.matches() now accepts a tuple or list of strings/Wikicode objects
  instead of just a single string or Wikicode.
• Given the frequency of issues with the (admittedly insufficient) tag parser,
  there's a temporary skip_style_tags argument to parse() that ignores '' and
  ''' until these issues are corrected.
• Fixed a parser bug involving nested wikilinks and external links.
• C code cleanup and speed improvements.