-Added new DisplayName property

-Implemented DisplayName on cube grids and characters
-Finished up more of the implementation for adding and removing blocks from cube grids
-Added Queue property to ProductionBlockEntity

-Added method to clear the queue of production blocks
-Added chat command to clear the production queue of all production blocks
-Fixed bug in cube grid name calculation
-Added dialog for adding new cube blocks to cube grids
Merge remote-tracking branch 'upstream/master'