Added archer and mage class implementations. Classes are now unable to counter attack if not in range

reviewed and modified Section 1 (Introduction), Section 4 (Connection), Section 6 (Traceability Matrix)

Completed sections 2 and 3. Note that the rest of this document is still a template. Revisions to sections 2 and 3 may be neeeded.

Merged parts of commit b118f334 (the parts that don't delete our docs).

This reverts commit b118f334

Changed 2 arrays into Enums in unit and button. Added doxygen documenation for : Archer, Button, DamageCalculation, Game, GameState, HowToPlay,HowToPlay2, HowToPlay3, Mage, Unit, Warrior