Moved some classes to better packages.
Fixed display of selected item.
Merge branch 'multiplayer' into multi-dropItem

Conflicts:
	src/main/java/org/terasology/logic/characters/CharacterSystem.java
got rid of my NetworkEvents, using AbstractEvent instead.
got rid of runLocally on @Server annotation. onDropItemRequest now simply ignores the event client-side
on dropping an item, stack reduction and item removal is now performed using the inventory manager