Add option to set random seed for deterministic behavior

Bump version to 1.6

lib/maze.c

@@ -1,13 +1,21 @@
 #include <mazemaker.h>
+#include <stdlib.h>
 #include "grid.h"
 #include "prim.h"
 
-void mazemaker_generate_maze(int width, int height, mazegrid_t* result) {
+void mazemaker_generate_maze_opt(int width, int height, mazegrid_t* result, mazeoptions_t const* options) {
     mazegrid_t g = mazegrid_new(width, height);
-    mazegrid_randomize(&g);
+    mazegrid_randomize(&g, options);
     prim(&g, result);
     mazegrid_free(&g);
 }
+
+void mazemaker_generate_maze(int width, int height, mazegrid_t* result) {
+    mazeoptions_t* options = mazemaker_options_new(); // use defaults
+    mazemaker_generate_maze_opt(width, height, result, options);
+    mazemaker_options_free(options);
+}
+
 void mazemaker_free_maze(mazegrid_t* maze) {
     mazegrid_free(maze);
 }