Fixes #1963

Description of the changes:

• names of modules is corrected
• default values for the image size is taken from the given array
• the callback is correctly specified
• the reference count on the numpy array is incremented
• the declaration of k4a_image_create_from_buffer has been corrected

Before submitting a Pull Request:

• I reviewed CONTRIBUTING.md
• I built my changes locally
• I ran the unit tests
• I ran the functional tests with a device
• I ran the performance tests with a device

I tested changes on:

• Windows
• Linux