update v21.3

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  

Modern Office but it's exteriors  

- Added the Office building to the new "16_Office" theme (+ a version without the balconies)
- Added a modular version (both in height and width) of the Office building so you can make your own 

See you and happy game-making! :)