AUI-1291 Unit test for aui-widget-toggle module

This is the unit test for the aui-widget-toggle module. I'm creating
separate test .js and .html files for each submodule, as they're really
independent from each other so it's best to isolate their tests.
AUI-1291 Unit test for aui-widget-cssclass module

The unit test for the aui-widget-cssclass module.
AUI-1291 Unit test for aui-widget-trigger module

The unit test for the aui-widget-trigger module.
AUI-1291 - SF
AUI-1291 Source formatting