* Introduced new table character_battleground_data
* Entry point is now stored on BG enter event not join event
* Entry point for dungeons is now correctly set to nearest graveyard
(this prevent well known assert in GetInstance because of porting to already destroyed instance)
* Teleporting from BG correctly restore mount state
* Teleporting from BG correctly restore taxi flight
(in multipath flight you will end up in nearest transition point on the route)
Signed-off-by: ApoC <apoc@nymfe.net>
