New functions and events, fixes, changes in sk_* functions

Fixed durability, pfacing and sk_region_addmember, add support to sk_* functions for __global__ region, add player_portal_travel and inventory_drag events, add player info to vehicle_enter event, add player info to vehicle_enter event, add sk_region_rename, get_entity_max_speed and set_entity_max_speed

Durability can be greater than 127 so we need short type instead of byte.
Pfacing bad works if a player had the only number as a nickname.