switch nyc boroughs to use pediacities/zetashapes

formerly, click that hood was using the nyc shapes that are, I believe, based on census tracts, and so need to combine distinct neighborhoods yielding places like "Carroll Gardens-Columbia Street-Red Hook"
dissolve broken up features
point to correct pediacities url
Merge branch 'master' of https://github.com/blackmad/click_that_hood into blackmad-master
Merge branch 'blackmad-master'