Tons of code tweaks made due to live testing. Added methods to modify/check horse access lists. Made getHorse() method errors more verbose to help track down missing horses issue. Implemented code in EntityDamage event to check for void damage and teleport the horse to that world's spawn, this should prevent horses from falling forever into the void.

Ongoing issues: horse.getOwner() returns null for unknown reasons when horse has not been untamed/freed, possible bukkit issue.
Forgot version change D:! CobraCorral now 1.1 :D