adhering to naming conventions

Author: th-blitz

c/07_trees/104_max_depth_of_binary_tree.c renamed to c/104-max-depth-of-binary-tree.c

@@ -1,4 +1,4 @@
-#include "../tree.h"
+#include "tree.h"
 #include <stdlib.h>
 #include <stdio.h>
 

c/07_trees/110_check_for_balanced_binary_tree.c renamed to c/110-check-for-balanced-binary-tree.c

@@ -1,4 +1,4 @@
-#include "../tree.h"
+#include "tree.h"
 #include <stdlib.h>
 #include <stdio.h>
 #include <stdbool.h>

c/07_trees/226_invert_binary_tree.c renamed to c/226-invert-binary-tree.c

@@ -1,4 +1,4 @@
-#include "../tree.h"
+#include "tree.h"
 #include <stdlib.h>
 #include <stdio.h>
 

c/07_trees/543_diameter_of_binary_tree.c renamed to c/543-diameter-of-binary-tree.c

@@ -1,4 +1,4 @@
-#include "../tree.h"
+#include "tree.h"
 #include <stdlib.h>
 #include <stdio.h>