update v17.5

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- Prepatory additions to build the foundations for future themes such as the shopping mall -
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- Added an escalator to go from a floor to another
- Added a going up animation and a going down animation to the escalator
- Added a modular glass railing and some columns (6 at the moment) to give a better perspective illusion
- Added an half-tile floor to fake the floor thickness, tomorrow I'll draw one for each floor tile!

*Everyone who already bought the asset can get the new stuff for free

See you and happy game-making! :)