[REQUEST] Post ChangedDimensionEvent earlier, and make it cancellable

[yuuka-miya]

This is to allow mods which for one reason or another want to prevent players from travelling to other dimensions.

An example would be a mod which wants to keep a particular player, or group of players, in a particular dimension.

I would make a PR, but if this is done as part of the 1.8 update, all the better.

[Tarig0]

I think this should be a new event that gets thrown earlier, just to keep things in the correct order.

for example if I handle inventory per dimension what happens if you cancel the event after the inventory is swapped.

[lumien231]

Exactly! I had that problem with http://minecraft.curseforge.com/mc-mods/224196-dimension-inventorys . Since the event fires so late i had to hack around it.