Revision 1 of the Test Plan - Fixed mistake in a test case, named all test cases, modified system test description

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