Large refactor, move object and tile types out into the proto

proto/roveapi/roveapi.proto

@@ -134,6 +134,35 @@ message CommandResponse {}
 // Radar
 //
 
+// Types of objects
+enum Object {
+	// ObjectNone represents no object at all
+	ObjectNone = 0;
+
+	// RoverLive represents a live rover
+	RoverLive = 1;
+
+	// RockSmall is a small stashable rock
+	RockSmall = 2;
+
+	// RockLarge is a large blocking rock
+	RockLarge = 3;
+}
+
+enum Tile {
+	// TileNone is a keyword for nothing
+	TileNone = 0;
+
+	// Rock is solid rock ground
+	Rock = 1;
+
+	// Gravel is loose rocks
+	Gravel = 2;
+
+	// Sand is sand
+	Sand = 3;
+}
+
 // RadarRequest is the data needed to request the radar for a rover
 message RadarRequest {
   // The account for this request
@@ -147,10 +176,10 @@ message RadarResponse {
 
   // A 1D array representing range*2 + 1 squared set of tiles, origin bottom
   // left and in row->column order
-  bytes tiles = 2;
+  repeated Tile tiles = 2;
 
   // A similar array to the tile array, but containing objects
-  bytes objects = 3;
+  repeated Object objects = 3;
 }
 
 //