Implement Strategist play decisions

[krogenth]

In order to better determine what our Army and scouting units should do, we will need the Strategist to specify what type of play we should be doing. These plays will include:

• scouting
• attacking
• defending

While the Strategist itself will not directly command units, these decisions will help facilitate the unit's individual decision making.

At the start of a game, the opening decision should be to scout, in an attempt to discover where the enemy's main base is. But as the game progresses, we will want to potentially adjust what the general decision is.