added create_explosion and more event handlers.

docs/scarpet/resources/editors/idea/4.txt

@@ -43,4 +43,5 @@ __on_player_dies(player) ->
 __on_player_respawns(player) -> 
 __on_player_disconnects(player, reason) -> 
 __on_player_connects(player) -> 
-__on_explosion(pos, power, source, create_fire, blocks, entities) ->
+__on_explosion(pos, power, source, causer, mode, fire) ->
+__on_explosion_outcome(pos, power, source, causer, mode, fire, blocks, entities) ->