#6: Added a class that can expose one element's attributes through
another.
Added an internal template attribute allowing the developer to specify
in the template XML that an attach point should expose its attributes
through the base templated element.
Modified the button template to expose the attributes of the content
pane.
Tested this ability by using a simple layout for the button in the
button test XML and specifying left and top attributes for one of the
contents (these are not accepted under a parent with a flow layout).
Improved the error handling ability of the browser a little more.