Remove empty folder in analysis/compression_analysis (#897)

* Add compression_analysis

removing analysis/compression_analysis to just compression_analysis

* Delete PSNR-example-base.png

* Delete PSNR-example-comp-10.jpg

* Delete compressed_image.png

* Delete example_image.jpg

* Delete example_wikipedia_image.jpg

* Delete original_image.png

* Delete psnr.py