added . operator, changed priorities of ~ and ., cleaned entity_event handler and docs, replaced default call function to space, added stacktrace to unknown exceptions, renamed event to 'on_damaged'

src/main/java/carpet/script/CarpetEventServer.java

@@ -235,7 +235,7 @@ public class CarpetEventServer
     private ScheduledCall makeEventCall(CarpetContext cc, String function, List<Value> extraArgs, int argCount)
     {
         UserDefinedFunction udf = cc.host.globalFunctions.get(function);
-        if (udf == null || (udf.getArguments().size()-extraArgs.size()) != argCount)
+        if (udf == null || (udf.getArguments().size()-(extraArgs == null ? 0 : extraArgs.size())) != argCount)
         {
             // call won't match arguments
             return null;
@@ -389,11 +389,9 @@ public class CarpetEventServer
     }
     public ScheduledCall makeDamageCall(CarpetContext cc, String function, List<Value> extraArgs)
     {
-        return makeEventCall(cc, function, extraArgs, 3);
+        return makeEventCall(cc, function, extraArgs, 4);
     }
 
-
-
     public void onEntityDeath(ScheduledCall call, Entity e, String reason)
     {
         call.execute( Arrays.asList( (c, t)-> new EntityValue(e), (c, t)-> new StringValue(reason)));