[#26][#39] Change from location_city.. to city, adress, coutry and add type Timestamp to start_time, end_time
[#26][#39] More good look of ccs file and remove emty lines and comments
[#26][#39] Remove not needed gem sdoc
[#26][#39] Change validate to hash 'presence: true'
[#26][#39] Change id to more like ruby style