Hw10

HW10 Submission

Projects:
1. Add the ability to comment on images. (5 pts.; app_feature)

2. Write a URL handler so that each image is referred to by its number, e.g. /image_raw/10; make it so that going to the latest image in your imageapp redirects to the right image number. (5 pts; app_feature)

Note: I accidentally put the first project in my hw9 branch and merged it into master so the change is not reflected in this pull request. It should be within the last few commits on master though.