Epic structure changes:
- All epic structures are now able to be improved.
- All epic structures can be moved and rotated by their owners.
- All epic structures cannot be moved and block deeds if they are involved in an active mission
- Epic structures will not block deeds and will be removed from the pool
of possible targets if on deed on all servers.
Bugfix: Tile item count will be checked for items dropping on creation and being unloaded in order to prevent piles of more than 100 items.