Threat system improvements

[CarsonBurke]

-Default defensive and offensive threat -Additional defensive and offensive threat -Additional threat slowly decreases over time -Offensive threat is increased when an enemy forces a safemode, sends a nuke, destroys important structures, gets ramparts to low hits, quads are identified, power creeps are used etc. -Defensive threat is increased when our attacker is killed, good defensive tactics are sighted, An enemy is effectively aggressive (say a defender goes out from ramparts and kills our attacker), boosts are used, power creeps are used, etc. -The threat system should be effective enough to influence target rampart hits for the bot -Threat system should also influence how much energy to float in storage, and credits to float