Update Bukkit: 1.5.2-R1.0-4-ga70ffc5 - CraftBukkit: 1.5.2-R1.0-18-ga8c0dc1

Bukkit:
a70ffc5 Update Bukkit for Minecraft 1.6.2

CraftBukkit:
a8c0dc1 Update CraftBukkit to 1.6.2
Update Spigot to Minecraft 1.6.2
PendingConnection.c() -> d()
Remove patch that prevents piston extend event firing twice - causes pistons to eat blocks on some occasions. Thanks Salaman and his team for debugging.
Initial 1.6.2 Update

As with the initial 1.6.1 update, this is very experimental. Unless you want to see Sayains come down and turn into giant apes and kill us all, I highly suggest backing up your server before trying this.

All issues should be reported to http://issues.libigot.org

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