New feature: transport groups (#172)

https://thepit.ja-galaxy-forum.com/index.php?t=msg&goto=365395

Strategic/Strategic Movement.h

@@ -15,6 +15,7 @@ enum //enemy intentions,
 	PATROL,							//enemy is moving around determining safe areas.
 	REINFORCEMENTS,			//enemy group has intentions to fortify position at final destination.
 	ASSAULT,						//enemy is ready to fight anything they encounter.
+	TRANSPORT,				//rftr: enemy is carrying out non-combat tasks, but still has an escort
 	NUM_ENEMY_INTENTIONS
 };
 
@@ -109,6 +110,9 @@ typedef struct ENEMYGROUP
 #define GROUPFLAG_KNOWN_DIRECTION					0x00000080
 #define GROUPFLAG_KNOWN_NUMBER						0x00000100
 
+// rftr: strategic transport group direction flag
+#define GROUPFLAG_TRANSPORT_ENROUTE					0x00000200
+
 typedef struct GROUP
 {
 	BOOLEAN fDebugGroup;					//for testing purposes -- handled differently in certain cases.