make the pull script do errors better

htdocs/pull.php

 <?php
 
-exec("cd ..; git reset --hard HEAD; git pull");
+exec("cd ..; git reset --hard HEAD; git pull", $retArr, $retVal);
+
+if ($retVal == 0) {
+	print(ok);
+	exit(0)
+}
+
+print("not ok\n");
+var_dump($retArr);
+var_dump($retVal);
 
 ?>
\ No newline at end of file