2.0 ReaderWriterLockSlim Extensions & More

This release is a revamp of the original to follow modern API standards.
It refines any processes that existed to be best practice and highest possible performance.
It also provides an interface (IReadWriteLockingHandler) for defining other read-write locking mechanisms that could facilitate a fluent API for contextual locking.

See the README.md and code docs for more info.

1.4.1

Updated version.