Maryland precincts
Fix Baltimore city precinct description
South Dakota precincts
Oklahoma Precincts
Merge pull request #65 from jjensenmike/md_precincts

Maryland precincts
Merge pull request #66 from jjensenmike/sd_precincts

South Dakota precincts
Merge pull request #67 from jjensenmike/ok_precincts

Oklahoma Precincts