Added the AvatarStateOnFinalBlow

When a player with access to the Avatar State is going to receive a
killing blow, they will not die and will access the Avatar State. This
is able to be enabled and disabled in the config.
AvatarStateOnFinalBlow Patch #1

Fixed the final blow being cancelled regardless of the cooldown status
of the Avatar State resulting in a player who cannot die.
Randomly Select a Player's Element When They Join

A player is randomly assigned to be either a chiblocker or a bender.
This can be disabled, the percentages are customizable, and the default
element if they don't receive the others is also customizable.
Merge pull request #2 from Alex-The-Coder/master

Added the AvatarStateOnFinalBlow and Randomly Select a Player's Element When They Join