516 compatibility PR [WIP]

[ShiftyRail]

What this does

This makes the server compilable and playable in BYOND 516. This is a work in progress PR.

• Convert /vector now-native type into a custom subtype to maintain all our features
• Fix the overdark/darkness planes to render properly in 516. This causes MINOR features discrepency as I had to change the behaviour of dark_plane for people who wear night vision googles, for grues, and for spiders. The effect isn't directly noticeable.
• Fix TGUI interfaces. They straight up do not work in Chromium.
• More testing maybe ?

Why it's good

516 liberates us from IE, is faster overall, is a more modern version of BYOND with more features, and has considerable rendering improvments. As a full disclosure I initially wanted to do this to test if Euro/vg/Lights were doable in this iteration of BYOND. They are, but they will be (if ever) the subject of a later PR.

How it was tested

Local test server compilation, some fiddling around with gameplay, test of TG/Nano/Raw HTML interfaces.

Nota Bene

This change would require all clients to migrate to 516 at the same time we migrate to 516 server-side ; the overdark changes would make the game unplayable on a non-515 client.

Changelog

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• experiment: Port the game to BYOND 516 for better features, in particular improved HTML UI responsiveness. Please report any bugs.

[aacovski]

why did you close it? smh