For each photo that ends up in the main paper or the supplemental, we save its ID in a sorted text file.

The files are:
    fig10-ids.txt           Figure 10
    fig11-ids.txt           Figure 11
    fig14-ids.txt           Figure 14
    fig15-ids.txt           Figure 15
    supp-queries-ids.txt    Supplemental "example test set queries"
    supp-reverse-ids.txt    Supplemental "example test set reverse queries"

The URL for a photo is: http://www.houzz.com/photos/[ID]/
