Implement aggro meter for RoF2 (RoF wasn't tested)

I didn't test RoF, so it's disabled for now (change AggroMeterAvaliable if you want to test)

Group member meters probably buggy ... but do later

The "lock target" feature isn't working currently either

zone/CMakeLists.txt

@@ -4,6 +4,7 @@ SET(zone_sources
 	aa.cpp
 	aa_ability.cpp
 	aggro.cpp
+	aggromanager.cpp
 	attack.cpp
 	beacon.cpp
 	bonuses.cpp
@@ -132,6 +133,7 @@ SET(zone_sources
 SET(zone_headers
 	aa.h
 	aa_ability.h
+	aggromanager.h
 	basic_functions.h
 	beacon.h
 	bot.h