Basic structure placement

[Mads Boddum]

Create the StructureManager class. This class is responsible for handling placement of structures. To keep it simple for now, there'll be no server-side checks of the chosen location.

Send EnterStructurePlacementModeMessage packet to the one wanting to place their deed. Their response will be the placeStructure command, which has arguments:

1. Deed object ID
2. Position on the X-axis
3. Position on the Z-axis
4. Rotation

When the structure is successfully placed, broadcast a PlaceStructureIntent, containing the SWGObject.

[Mads Boddum]

This is what I have in mind.