Initial Update to 1.6.1

This is very experimental! It may kill your cat or eat your poodle! Any and all issues should be reported to http://issues.libigot.org

Changelog
 - Update Bukkit and CraftBukkit patches to match upstream
 - Fixed conflicts in Libkit and Libigot patches
 - Removed unneeded patches (World Emulator, Diff Visibility, etc)

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