function create images fails when using images_to_movies

[firstkingofrome]

Hello the function create_images has some problems (I am running on python 2.7.14:
in image.py

1. On line 200 glob isnt invoked correctly, should be all_files = glob.glob(os.path.join(folder, "*.sw4img"))
2. Similarly on line 200 warn(msg) needs to be warnings.warn(msg)
3. patch data needs to be accessed, not the patch object
   global_min = min(global_min, patch.data.min())
   global_max = max(global_max, patch.data.max())

[shaharkadmiel]

There where some bugs indeed. Everything seems to work now. Install from master and let me know if problems persist.