v1.1
Version 1.1 adds support for 3 new field parameters:
allow_null
If set to true, this parameter sets the first option of a select field to a null (blank) value.
default_all
Used to pre-select all of a field’s options by default. This parameter may only be used with checkbox & multi-select fields.
exclude
This parameter allows you to exclude specific options from select, multi-select, checkbox and radio button fields. This is useful if you need to exclude certain option(s) from a field that generates its options automatically (such as a taxonomy field).
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Thanks to Braunson for contributing to the addition of "default_all" and "exclude" features.