Refactored Maze Generation to use RoomData

Rewrote portions of our maze generation code to use RoomData. This
provides an object that unifies all room data instead of having it
spread across various data structures and linked loosely by hash maps.
We'll need this to implement the remaining generation features.

src/main/java/StevenDimDoors/experimental/MazeLinkData.java

@@ -0,0 +1,6 @@
+package StevenDimDoors.experimental;
+
+public class MazeLinkData
+{
+
+}