attempting to clean up Park Central Square chronology and labels
clean up start dates of roads around Springfield
add Mt Vernon St and some connections
add streets northwest downtown Springfield
updates to Fairground Addition
add missing start date for Pine Bluff AR
adjust chronology of Springfield MO, add sources
add some east downtown Springfield streets
add W Madison St and Patton Ave alley
add missing end date to N Mulberry (Jefferson)
Adding Jefferson Street and road
Adjusted and continued College Street
Added and adjusted some roads south of downtown Springfield
Added and adjusted some roads south of downtown Springfield
Changed Walnut Street to Secondary
Added Ozark Road, and split some streets to east and west parts.