IOCore:
  @version 1.0

  ✘ Add IOImmutableList, yet thiking about put this in library. @cancelled (16-11-23 17:11)
  ✘ Add IOImmutableMap, yet thiking about put this in library. @cancelled (16-11-23 17:11)
  ✔ Add IOSet. @done (16-11-22 11:55)
  ✔ Add IOFile. @done (16-11-22 12:06)
  ☐ Add in IOFile, IOWriter, and IOReader.

  ☐ Add the IOCore command administrator.
  ☐ Fix: add in IOCore the JSON Parser, and create the methods.

  ✔ Add IOEconomy. @done (16-11-24 16:31)
  ✔ Add IOEconomyPlayer, for get money and transactions of player. @done (16-11-24 16:31)
  ✔ Add the register, load, and save accounts. @done (16-11-24 16:31)
  ✔ Test IOEconomy. @done (16-11-24 16:31)
  
  ✔ Add IOBlock. @done (16-11-23 17:11)
  ✔ Add in IOBlock, the block regeneration, method setBlockRegenerationAB(boolean flag, int duration). @done (16-11-23 17:11)
  ✔ Add in IOBlock, when block event, play effect. @done (16-11-23 17:11)
  ✔ Add in IOBlock, the silk for break mob spawners. @done (16-11-23 20:01)
  ✔ Create the method for create spawner, if the silk for break mob spawner is enabled. @done (16-11-23 20:01)

  ✔ Add in IOEnvironment, the method clearAllEntities() @done (16-11-23 13:56)

  IOEntity, in method setFollowing, the method create task "entity_following_playerName", the only one animal can following the player.

  ✔ Add IOScoreboard (this is MCAPI library). @done (16-11-22 11:44)
    Add management of scoreboard.
  ✔ Add IOSound (this is MCAPI library). @done (16-11-22 11:44)
    Add method playSound(Player player, Sound sound), this method play sound.
  ✔ Add IOCommand (this is MCAPI library). @done (16-11-22 11:44)
    The simple method for register command.

  ✔ Added method in IOMessages, msg(Player player, String... msg), this method send list messages. @done (16-11-20 18:17)