Merge in API for removing scores per player per objective

Created by @cybertiger
Bukkit Pull Request: https://github.com/Bukkit/Bukkit/pull/848
CraftBukkit Pull Request: https://github.com/Bukkit/CraftBukkit/pull/1131

Signed-off-by: Steven Downer <grinch@outlook.com>
Fix patch number for "Properly Close Inventories" patch

Signed-off-by: Steven Downer <grinch@outlook.com>