update FormWidget / FormValueWidget doc, fixes #329
Use jquery rather than dojo for DOM manipulation and animation.  Fixes #203.
Dojo still used for Deferred (see ibm-js/sdk#5) and some test files.

Switched to requirejs-dplugins 0.4.x, decor 0.4.x, and dpointer 0.4.x to get jquery! plugin.
dojo/sniff --> decor/sniff
bump version to 0.5.0-beta