Templatizing Twitter OAuth callback URI so it comes from a single source of truth.
Templatizing Twitter OAuth callback URI so it comes from a single source of truth.

magul/streetmix,CodeForBrazil/streetmix,kodujdlapolski/streetmix,magul/streetmix,CodeForBrazil/streetmix,magul/streetmix,macGRID-SRN/streetmix,codeforamerica/streetmix,kodujdlapolski/streetmix,codeforamerica/streetmix,macGRID-SRN/streetmix,codeforamerica/streetmix,CodeForBrazil/streetmix,macGRID-SRN/streetmix,kodujdlapolski/streetmix