SpigotMC/Spigot — pull request #45 by lazertester (2013-07-17 06:49:24+00:00)
Title: Added Player Collision API, thanks MonsieurApple

This adds the ability to disable player collisions, useful for things like vanishing players and spectating in such a way that players do not interfere with arrows and other projectiles. It is directly taken from @MonsieurApple and the Overcast Network's Sportbukkit so they deserve the credit for being awesome.