fix issues with correct selections in select, checkbox, and radio; fixes #44
throw errors in afFieldMessage and afFieldIsInvalid helpers when the field doesn't exist in the schema; fixes #46
add field name to "invalid field name" error message
-add support for new types "readonly" and "disabled" on quickForms; closes #47
-for quickForms, when a field has "allowedValues" in the schema, make it a "select" element with those values for the options
update docs and bump version