update v14.3

The "Metropolis" update series will include tons of new buildings and elements for your city,  with the goal to supply a complete and realistic city tileset  

- Added an helicopter landing pad warning sign and an helicopter sign
- Added a public phone (3 tops available) and a phone box (2 tops available)
- Added a loopable 20 frames animation for the phone box door

See you and happy game-making! :)