Raise an exception if we can't parse configuration; ignore simple config values to allow storing complex ones.
Allow comma-separated UUID field to properly handle null values.
Assume that fields with registered converters are present on task record.
Merge pull request #54 from coddingtonbear/cautious_configuration_handling

Raise an exception if we can't parse configuration; ignore simple config...
Merge pull request #58 from coddingtonbear/csuuid_field_enhancements

Allow comma-separated UUID field to properly handle null values.
Merge pull request #59 from coddingtonbear/assume_specified_fields_have_value

Assume that fields with registered converters are present on task record.
Merging in upstream changes.