Bukkit/Bukkit — pull request #725 by AlphaBlend (2012-11-30 16:28:15+00:00)
Title: - Add API to get vehicle creation reason, and make VehicleCreateEvent cancellable

Firstly, this includes a reason for a Vehicle's creation, but the heart of this PR is in its implementation.

It was previously impossible to cancel this event because of how this was handled on the server. I made the appropriate changes in the server code, so this needed some additional changes.