#112464 standardize validation in field rather than widget, standardize use of $items rather than $node_field

 in content.module)

 when maxlength left empty - I forgot one #maxlength = '' occurrence

- updated some invalid strings for translation
- updated .pot file

#89172 improved handling for optionwidgets, adding ability to create options as an  array in php or as a list of values. Also fixes View handling, making sure the right value is swapped in for the option in Views tables and lists.

- Errors when user references were left blank

code. This will require fixes to any themes that rely on the node data
structure previously used.

Added a $node_field parameter to hook_field() and hook_widget(). This eases
a very common pattern of getting and setting this value. While $node is still
passed by reference, fields should *not* modify it. Instead, modify $node_field
which is saved back automatically.

This is ground work for implementing select/checkbox/radio widgets.