===== 2.0 =====

 * Allow the namespace attribute in HTML5 elements.
 * Always print polyglot XML. ( document correct as HTML5 and as XML )
 * Add new polymorphic types to HTML5 ( between_phrasing_and_phrasing_without_interactive, ... )

===== 2.0-rc1 =====

 * Some fixes to match the latest HTML5 working draft (05/08/2011).
 * Simplification of the functorial interface (use module substitution)
 * Fix IFrame usage.

===== 1.91 =====

 * First independant release (was released with ocsigen)
 * Add a functorial interface for concrete XML representation
 * Add a functorial interface for stream printer
 * Rename XHTML5 into HTML5
 * Change the default syntax to HTML5 instead of XHTML 1.1
