Uses the glob, image, and rayon crates to resize all of the .jpg in the current directory into a thumbnails folder.

run with: cargo run --release with some .jpg images in the top level directory of the repository.

Test was run against 196 images from an 18MP dslr (~1GB of images).

Used the Nearest resize algorithm from the image crate, resizing to a 300px thumbnail.

Results from i5 4670k (4 cores/threads):

• No rayon: 63.837 seconds ~50% cpu usage
• With rayon: 33.094 seconds ~97% cpu usage