TIC-80 retro game programming with D via WebAssembly

[Pierce Ng]

[TIC-80](https://github.com/nesbox/TIC-80) is a fantasy retro 
gaming console programmable in several scripting languages and 
WebAssembly.

I implemented D bindings for TIC-80's API, for use via 
WebAssembly. The bindings have been merged into TIC-80's [latest 
release](https://github.com/nesbox/TIC-80/releases/tag/v1.0.2164).