Update Raw Data/dunkin_donuts.csv

Added Dunkin Donuts name, did some cleaning.
Structure: Name,Street,City,PostalCode,Country,latitude,longitude,GPS
Some 170 entries have only coordinates, no other info.
Update README.md

Reflected the changed structure of Dunkin Donuts dataset
renamed the edited dunkin donuts dataset.
Structure: Name,Street,City,PostalCode,Country,latitude,longitude,GPS
Merge pull request #1 from Guiriguanche/master

Added an edited version of the Dunkin Donuts csv file.