[Florida] Add Miami (Metrorail and Metromover stations)

[Manu1400]

"status of elevators and escalators at all Metrorail and Metromover stations" :

• http://www.miamidade.gov/transit/elevator-escalator-status.asp (Metrorail Stations and Metromover Stations)
• https://www.miamidade.gov/transit/mobile/facilities.asp?type=Rail (group by type : elevator, escalator)

source : http://www.miamidade.gov/transit/accessible-services.asp

[Manu1400]

List of Elevators under Miami-Dade County Jurisdiction : http://www.miamidade.gov/facilities/library/elevator-listing.pdf (list with IDs of many elevators)