Added clarification to Player.setScoreboard to ensure users know how to
return a player to using the main scoreboard from a custom scoreboard and
alleviate any confusion caused by the second IllegalArgumentException
description
Merge #63

Thanks @XHawk87

commit b38cba8545af2dda87cc40fa4666f4173c65aa68
Author: XHawk87
Date:   2013-12-15 04:33:51 +0000

Added clarification to Player.setScoreboard to ensure users know how to return a player to using the main scoreboard from a custom scoreboard and alleviate any confusion caused by the second IllegalArgumentException description
Fix warnings