v2.4

Fix converting HTML special chars in TextHandler

v2.3

• Add support for UTF-8 encoded templates
• Add HTMLHandler
• Improve AppendHandler to allow more than one root element in the imported document
• Add renderTemplate($template, $data) to allow rendering templates in a variable instead of a file

v2.2

Always sort attribute stacks by ascending level

v2.1

Allow data objects, improve exception handling