[C]Spawn in minecarts with direction specified Adds Bukkit-4220

Added a direction when spawning minecarts. (Set their yaw).

PR Description:

Issue: Within the bukkit api you cannot spawn in a minecart with a set yaw.

Justification: This may be needed for systems requiring control over minecart mechanics such as cars, etc...

Breakdown: Very simply setting the carts yaw when its spawned into the world.

Testing: Tested on a local test server. Ip: playcircacraft.uk.to:55170 (limited uptime)

Ticket: Adds BUKKIT -4220