update v19.3

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  

The Swimming Pool is the newest theme, both fitting the School Yard and urban areas

- Added an Ice Crea Stick inflatable toy (3 colors + munched + floating)
- Added a Donut inflatable toy (+munched + floating)
- Added all the "City_Terrains" theme single files (1000+), the only missing theme of the "singles" folders
- Fixed some bugs with the diagonal tiles of some terrains
- Updated the theme files with the new stuff

See you and happy game-making! :)