Added examples of lang/hitch, lang/delegate, and lang/mixin from the Dojo course work.
Added examples of lang/hitch, lang/delegate, and lang/mixin from the Dojo course
work.

pilbender/dojoExample,pilbender/dojoExample,pilbender/dojoExample,pilbender/dojoExample,pilbender/dojoExample,pilbender/dojoExample,pilbender/dojoExample,pilbender/dojoExample,pilbender/dojoExample