Listview and extensions: Simplifying extensibility with the introduction of the private methods _beforeListviewRefresh and _afterListviewRefresh that surround the listview refresh and can be overridden from extensions.

Listview autodividers: Use .children() instead of .find() to avoid affecting nested lists.
Performance improvement: http://jsperf.com/improve-autodividers
Whitespace.
Merged demos test pages in widget reference directories.