Adding files for Admin UI spawning: tabs.js for overall rendering of tabbed...

Adding files for Admin UI spawning: tabs.js for overall rendering of tabbed interfaces, panel.js for rendering individual panel elements, jquery.dataAttr.js for reconciling jQuery's .data object and [data-] element attributes, table.js for (somewhat) easier rendering of table data from an array (rows) of arrays (cells); refactored spawn.js to use best option as the main function; added methods for chainable element spawner.