Hunt The Wumpus modifications

[fredtrimble]

Here is a summary of the changes:

• Modified the HuntTheWumpusGame class to use streams and lambda expressions.
• The ArrowKillsWumpus, ArrowsAccumulateInFarthestCavern, and PlayerCanNotShootWithoutArrows tests originally tested functionality in one direction. These tests were modified to use FitNesse decision tables instead. New FitNesse fixtures were added to support the decision tables.
• A new feature was added that allows the player to add a "pit cover" to an adjacent cavern. If a pit happens to exist in the chosen cavern and the player moves to that cavern, the player will not fall through and will not lose "hit" points. The player has one pit cover allowed per game. A suite of FitNesse tests were added for the feature.
• A swing GUI was added as well. Simply run the main method in the GUI "Main" class.

[unclebob]

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