• Fixed removing event handlers when setting them to undefined.
• Allow the text "{{}}" to appear in templates.
• Optimized clearing of Parts.
• Added unsafeHTML() directive to bind values as HTML source.
• Optimizations, simplification and bug fixes of Array handling code.
• Update to extension API: added partCallback parameter to render().
• Added the directive() decorator function to create directives. Functions values are no longer treated as directive by default, simplifying declarative event handlers.