Combine repos?

[GoFroggyRun]

The plots in gallery are stored in different github repos, where the "Border Adjustment Calculator" is in PolicyBrain, and the rest are in plots.

I think it is weird to have different repos to store these plots, and it would be more sensible to put these plots in a single repo. (Personally I'd prefer to have them within the PolicyBrain repo.)

cc @MattHJensen @hdoupe

[hdoupe]

This would be convenient. However, heroku's hard cap on application size would probably prevent us from combining repos given that the files in the gallery repo can be pretty large.