Implement Buccaneer Valiant special ability

Adds the ability for the buccaneer valiant to spawn a ship that rams
enemies and smashes them. Next to a script that triggers the ship skill
a few other changes had to be made:
- Force movement behavior server side calculation and sync
- The ship has no physics volume so the FindValidTargets for behaviors
had to be altered to allow ControllablePhysics entities to find entities
within their area. The "target_self" AOE flag has been used to replicate
the old behavior.

dScripts/CppScripts.cpp

@@ -261,6 +261,7 @@
 #include "PersonalFortress.h"
 #include "PropertyDevice.h"
 #include "ImaginationBackpackHealServer.h"
+#include "BuccaneerValiantShip.h"
 
 // Survival scripts
 #include "AgSurvivalStromling.h"
@@ -774,6 +775,8 @@ CppScripts::Script* CppScripts::GetScript(Entity* parent, const std::string& scr
 	    script = new PropertyDevice();
 	else if (scriptName == "scripts\\02_server\\Map\\General\\L_IMAG_BACKPACK_HEALS_SERVER.lua")
 	    script = new ImaginationBackpackHealServer();
+        else if (scriptName == "scripts\\EquipmentScripts\\BuccaneerValiantShip.lua")
+            script = new BuccaneerValiantShip();
 
 	//Ignore these scripts:
 	else if (scriptName == "scripts\\02_server\\Enemy\\General\\L_SUSPEND_LUA_AI.lua")