Program arguments

[emwestin]

We should make use of program arguments in order to simplify testing. Some examples:

Flag	Description
--opponent	Who should play as the opponent (AI, HUMAN, RANDOM)
--player	Who should play as the player (AI, HUMAN, RANDOM)
--ai-time-limit	Max time in ms per move
--ai-start-depth	Which depth to start from
--ai-max-depth	Max depth allowed

If we would like to make the evaluation function modular, we could perhaps also support something like the following where some/all are enabled by default:

Flag	Description
--eval-phases	Split the evaluation function into multiple phases performing different strategies for each
--eval-weighted-moves	Give each position a weight to favor some moves over others. For example, corners have high weights, x-corners have low weights
--eval-frontier	Take frontier into consideration
--eval-endgame	If the last move results in us winning, give the move a BIG evaluation score