Add a number of new cities

- China [#721446, dujiulun2006]
  * Jinan

- Ireland [#720871, Sergey V. Udaltsov]
  * Athlone
  * Bray
  * Carlow
  * Carrick on Shannon
  * Castlebar
  * Cavan
  * Clonmel
  * Drogheda
  * Dundalk
  * Ennis
  * Galway
  * Kilkenny
  * Lifford
  * Limerick
  * Longford
  * Monaghan
  * Mullingar
  * Naas
  * Navan
  * Nenagh
  * Newbridge
  * Portaloise
  * Roscommon
  * Sligo
  * Swords
  * Tallaght
  * Tralee
  * Trim
  * Tullamore
  * Waterford
  * Wexford
  * Wicklow

- Italy [#720777, Pierpaolo Vittorini]
  * L'Aquila
  * Pescara (corrected)

- Russia [#723434, Artem]
  * Rybinsk
  * Yaroslav

- Slovakia [#722301, riko442]
  * Dubnica nad Váhom
  * Martin
  * Nové Zámky
  * Partizánske
  * Prešov
  * Ružomberok
  * Spišská Nová Ves
  * Svidník
  * Trenčín
  * Žilina

(Cherry-picked from master, and with translation marks removed)