Create a GUI for annotating images for downstream ML
- add this package using Julia Pkg manager
- run "examples/labelimage.jl" to annotate
- Once image is open:
- Add marker by left clicking with the left command button
- Move the marker by left clicking when the left shift button is held down
- Remove the marker by left clicking when the left alt button is held down
- Save and move to the next image by clicking 'b'