Workaround for http://code.google.com/p/lanterna/issues/detail?id=79
'highlight' mode activated by spacebar
Re-add room placement, also determines highlight
Room to be placed is rotate-able
Update README with instructions
Rearrange README a bit
DungeonMap can add Room with simple validation
DungeonMap will not add non-adjacent Room
Extract room validator
Client colorizes placeable rooms green