Major Release 4.0.1

This is a major release, following the removal of the QueueFactory, AtomicQueueFactory and org.jctools.queues.spec package(deprecated since 3.0). These classes are still used for testing, but are not part of the release artifacts anymore.
New unpadded queue variants are also included in this release.
Further changes included:

• Fix table-size long math on very large tables
• Fix #355 by adhering to size semantic for queue emptiness

And many improvements to testing and code generation.