Update README
Update README

Fix typo, one other quick change.
beetz12/citygram,openchattanooga/citygram,elberdev/citygram-nyc,codeforamerica/citygram,codeforamerica/citygram,codeforamerica/citygram,chriswhong/citygram,codefortulsa/citygram,codeforamerica/citygram,shravan20084312/citygram,beetz12/citygram,BetaNYC/citygram-nyc,codefortulsa/citygram,BetaNYC/citygram-nyc,beetz12/citygram,codefortulsa/citygram,shravan20084312/citygram,chriswhong/citygram,openchattanooga/citygram,elberdev/citygram-nyc,BetaNYC/citygram-nyc,BetaNYC/citygram-nyc,elberdev/citygram-nyc,shravan20084312/citygram