Added an AgreementField widget
Displays an Agreement Document in a scrolling text field. The text of
the document can be set by modifying the 'text' property.
Patch by: Sverre Rabbelier
Rename TinyMCE to FullTinyMCE and add TinyMCE widget
The FullTinyMCE (irony intended) is the full-fledged editor, usefull
in editing documents etc. The regular TinyMCE widget can be used for
smaller tasks that allow HTML input (such as the description field).
Patch by: Sverre Rabbelier