[ Changes for 0.3.0 - XXX ]

* Stopped using APR and APR-Util.

* Variables are now opaque data types.

* Bundle our own version of Lemon.

* Added Ruby API.

* Added vim syntax highlighting mode. [Ryan Phillips <ryan trolocsis.com>]

* Keys in hashes no longer need to be quoted strings.

* Added support for pkg-config.

[ Changes for 0.2.0 - Mon, 05 Jun 2006 ]

* Added a data definition language, for storing variables to feed to ETL
  templates.

* Split scalar variables into integers and strings.

* Switched to our own error objects as return values rather than returning
  apr_status_t, so we can return more information about errors.

* Added a [%= shorthand that can be used instead of writing out [% print.

* Added support for ==, !=, <, >, <=, and >= comparisons to the if/unless
  keywords.

* Templates can now escape the start of a directive with a \ so they can
  use [% in their text.

* Added the ability to use literal strings and integers in templates.

* Added [% include "file.etl" %] syntax to template language.

* Added [%- and -%] for trimming whitespace before or after directives.

* Added the ability to loop over numeric ranges.

* Added the ability to make method calls.

* Added a website, with some documentation on the languages.

* Added the ability to use basic arithmetic operations in expressions.

* Added macro support to the template language.

[ Changes for 0.1.0 - Sat, 25 Feb 2006 ]

* Changed name from APR-Template to ETL.

* Switched to re2c based lexer and lemon based parser.

* Renamed command line client from tmpl to etl.

* Added support for utf8 data and variable names.

* Added support for filters that escape html, xml, and url data.

[ Changes for 0.0.1 - Tue, 06 Sep 2005 ]

* Initial release.