-----
* Added fs.append(field) fs.insert(field, new_field) and del fs.field to
Fieldset. fs.add() is deprecated.
* Added field.set() to modify the field inplace.
* bug fixes: issues 70, 80, 82, 97
* added spanish tanslation (thanks to robarago)
* added the `.with_html` method to `AbstractField` which will be
passed to the renderers, allowing to add some HTML attributes to rendered
HTML tags. Removed html_options from render method. (See issue 60)
* validators are now passed as second argument the `field` being validated. WARN:
this will mean adding the parameter to your functions to be backwards compatible.
The validator function signature changed from `myfunc(value)` to
`myfunc(value, field=None)`.
* ext.couchdb now use couchdbkit instead of py-simplecouchdb
* added the `.with_metadata` method to `AbstractField` which allows
you to add metadata to your field. The difference with `.with_html()` is that
the attributes passed in will not be rendered in the HTML element, but are there
only to be used in your templates, to tweak the output according to those
properties. See docs/forms.txt