Changes for deform2

This fixes js.deform to work with the current state of the deform2 branch
of deform.
Brown-bag:  Fix botched last-minute refactoring so package is importable.
Use TinyMCE from deform rather than js.tinymce.

The deform2 branch of deform currently has the latest release (4.0.6)
of tinymce.  Js.tinymce is at 4.0.2.  (The default skin name seems to have
changed from 'default' to 'lightgray' somewhere in there.)
form.css is still required
Bug fix: Add dependencies on jquery where appropriate
Include jquery.form in resource_mapping['deform']

(Because that's what deform.widget.default_resources does.)