CVS log for interchange/code/Widget/uploadblob.widget

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Fix incorrect license in headers GPL v2 -> GPL v2 "or later".  Update copyrights.

Fix incorrect license in headers GPL v2 -> GPL v2 "or later".  Update copyrights.

* Add header and license information

* Add descriptions to widgets

* Remove "File Upload" tab from meta_editor, which only served one
  widget.

* Relocate name_to and size_to from "File Upload" to ExtraMeta for
  uploadblob widget, where it now belongs.

* Add ability for Vend::Data::update_data to store filename
  and file size info in one upload. Adds the variable
  definitions:

  	mv_data_file_name_to_$name
  	mv_data_file_size_to_$name

  For instance, if you do:

	<INPUT TYPE=hidden NAME="mv_data_file_name_to_body" VALUE="filename">
	<INPUT TYPE=hidden NAME="mv_data_file_size_to_body" VALUE="size">
	<INPUT TYPE=hidden NAME="mv_data_file_field" VALUE="body">
	<INPUT TYPE=file NAME="body">

   the uploaded file would be stored to the "body" field, its
   name to "filename", and its size to "size".

   Size is a simple integer with all its implied limits. In
   actual practice HTTP server timeouts and browser file upload
   limits will ensure the value is large enough.

* Add new uploadblob widget with core and meta-editor support.

  If you have a BLOB field and want to upload files to it, select
  the "uploadblob=File upload to BLOB" widget. It will present
  a file upload widget, and provide the proper fields to do the
  upload.

  If you select the extended.size_to = <fieldname> option in
  the meta editor, the size of the uploaded file will be stored
  to <fieldname>. Ditto for extended.name_to, which stores the
  file name (minus prepending path) to <fieldname>.

  For example, you might do:

  	[display
		type=uploadblob
		name=body
		size_to=size
		name_to=filename
		]

	This will produce:

	<INPUT TYPE=hidden NAME="mv_data_file_name_to_body" VALUE="filename">
	<INPUT TYPE=hidden NAME="mv_data_file_size_to_body" VALUE="size">
	<INPUT TYPE=hidden NAME="mv_data_file_field" VALUE="body">
	<INPUT TYPE=file NAME="body">

* Add ability to define your widget types for display in the meta editor
  in the Variable UI_WIDGET_TYPES. Includes metadata formatting for
  the Preferences editor.