Added an arg value ('ar') that tells play_game_ai to use the Random_AI_Agent instead of the smart AI_Agent.   Also, run_results outfile now includes the AI type in the file name (so each AI type gets its own file).

Noticed that 2p and 3p games with smart AI seem to crash when "getAgentAction" is called.
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Added an arg ('ar') that calls play_game_ai wi