TAL changes

  This file contains change information for the current release. 
  Change information for previous versions can be found in the
  file HISTORY.txt.

    Version 1.3.3

      Features Added

      Bugs Fixed

        - tal:atributes was creating stray attributes in METAL
          expansion, and there was no unit test for this behavior.

        - tal:attributes parsing was not catching badly malformed
          values, and used "print" instead of raising exceptions.
