RestSchemaValidator module

# RestSchemaValidator Module Introduction

The RestSchemaValidator module provides an abstract REST schema validation API to Qore.

Primary classes provided by this module:

- AbstractRestSchemaValidator
- NullRestSchemaValidator

# RestSchemaValidator Module Release Notes

## RestSchemaValidator v2.0

- implemented support for the DataProvider API (issue 3545)

## RestSchemaValidator v1.1.2

- fixed `NullRestSchemaValidator` to report serialization errors instead of ignoring them and returning about `200 OK` response (issue 3547)

## RestSchemaValidator v1.1.1

- fixed `NullRestSchemaValidator` not respecting set Content-Type header from RestClass (issue 3427)

## RestSchemaValidator v1.1

- updated the default validator to try all serialization methods if multiple methods are available and one fails (issue 2831)

## RestSchemaValidator v1.0.2

- fixed the null validator to handle binary message bodies; fixed issues with `"text"` serialization with binary message bodies (issue 2816)

## RestSchemaValidator v1.0.1

- updated docs for AbstractRestSchemaValidator::parseRequest() to reflect how validation exceptions should be raised for proper error reporting (issue 2344)
- fixed handling of messages with non-object (i.e. non-hash) bodies (issue 2366)

## RestSchemaValidator v1.0

- initial release of the RestSchemaValidator module