Ok ok, a lot better remake for scoreboard visualization. Made with reflections (pain in the ass I might say), and we will send scoreboard packets directly to a player, avoiding Bukkit API entirely to avoid issues like this in future.
Included itemframe, painting and armorstand so they will be recognized in block break/place actions. FYI they are not blocks but entities officially... Mojang logic...
Some attempt to avoid an error message when using async economy and stopping plugin.
