added exemples in make_level.py module doc

make_level.py

@@ -5,6 +5,11 @@ We should test the levels in this directory and not in the source directory
 Usage: python make_level.py path_to_main/main.c
 See "python make_level.py -h" for a list of arguments  
 
+Examples:
+python make_level.py levels/local_struct/main.c --defines BUG --clear
+python make_level.py levels/local_struct/main.c --udefines BUG --clear --teacher
+
+
 /!\ LIMITATION:
 Cannot work with subdirectories every engine files has to be at the same level.
 This is the same for level files.