Add generator of image translation dataset

[luis-armando-perez-rey]

Add generation of dataset consisting of an image translated along the width and length with periodic boundaries

[luis-armando-perez-rey]

• [x] Add loader for dsprites
• [x] Add translation image generator with dsprites images

[luis-armando-perez-rey]

Finished implementing the image translation and tested generation. This addition requires the dsprites dataset from https://github.com/deepmind/dsprites-dataset placed in the appropriate data folder.