0.2.3

• Added header IDs extension.

0.2.2

• Fix for pathological reference link parsing.

0.2.1

• Speed optimisations.

0.2.0

• The formatters no longer produce Strings themeselves; you must specify an output stream.
• Speed up whitespace normalisation.

0.1.9

• Multibyte character fix for autolink (#35, Shaquille Johnson).
• Resolve panics with tables in awkward situations (#36).

0.1.8

• Fix possible DoS in link parsing (#33, Demi Obenour).