MIB Navigator Code

- Created generic accumulator and re-implemented min and max using it.

-Renamed asXXX() methods to toXXX()

-Renamed asXXX() methods to toXXX()
-Added Iterables.union()

Added annotation indicating iterator operations that are probably unsafe for infinite source sequences.

-Reorganized mapper classes.
-Added Distinct, Range, and Union iterators.
-Added annotation indicating iterables/iterators that are lazily evaluated.

Removed @Override due to abstract class becoming interface.

Refactored Throwable recording code into a common method.

Changed application to use JFrame.dispose() instead of System.exit(0)

-Refactored repetitive code for creating new attributes and elements into methods.
-Reorganized utility methods.

Made class final.