Merge pull request #590 from necrodoom/patch-60

Do not block user damaging self (ender eye)
Adding saddles to horses should properly tame horses.
Try to be a little less confusing with non-command debug errors.
Tidy up string manipulation in trade signs.
Add Balance Update Event.
Update Maven and Ant to use 1.7.2 Bukkit
Update to first build of 1.7.2 - CraftBukkit is still buggy so expect issues
Bukkit: #1856 CB: #2922
Merge remote-tracking branch 'origin/2.x' into 2.x
Update FakeServer - fixes compilation
Merge branch '2.x' of https://github.com/essentials/Essentials into 2.x
Merge branch '2.x' of https://github.com/essentials/Essentials into 2.x
Add cobweb aliases