icon with alpha and added col_description & required column's options
Added visualClear after "Add new row" button
Give focus to first column of new added row
datagridfield.js is not using jQuery: translated new focus code to pure JavaScript
fixed empty column issue when on edit
reuse plone domain for translate "required"
fixed tests
Merge pull request #7 from RedTurtle/required_column

Required column (and other features)
Dutch
Use 'required' and 'col_description' in one column in the demo types.
Column required: report the translated label when validation fails.

Note that the translation part currently does not work, but at least we get a nicer English name now.
Change ``Column.getLabel`` to support translation again.

You should pass a request as the context.
The 'required column' validator uses this to show a nice column name.
locales
No longer support ``label_msgid`` in Columns.  This was unused for years.
Support argument ``label`` plus the standard keyword arguments in all Columns.

``col_description ``, ``default``, ``default_method``, ``visible``,
``required``.

Child classes may support more arguments or keywords arguments.
check manifest
Set setup.py classifiers for Python 2.6 and 2.7.
cleanup setup.py
Preparing release 1.9.0
Back to development: 1.9.1