Refactor Spacestation2.cpp to not use strings for tilemaps

They are now stored in const int arrays instead. Except for the Prize
for the Reckless room, which I made sure had its spikes removed in No
Death Mode and the Time Trial.

desktop_version/src/Spacestation2.h

@@ -10,7 +10,7 @@
 class spacestation2class
 {
 public:
-	std::vector<std::string> loadlevel(int rx, int ry);
+	std::vector<int> loadlevel(int rx, int ry);
 	std::string roomname;
 };