Version 1.1 (Java 8+ compatible)

Update of original code for Java 8 (and above) with improved documentation and added tests.

• Default seed initialization is no longer based solely on the system clock.
• Unnecessary calls to "setSeed()" during parent class initialization are now ignored (performance).
• Supports safe serialization (synchronized, with consistency checking).
• Class is now final (best practice)
• Improved documentation.
• Minor code tidying (no functional changes expected).
• Added unit tests and golden data tests.