Update Readme.md

Author: jaredly

Readme.md

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 Ok folks, here it is. The source code is still living over in the [fluid repo](https://github.com/jaredly/fluid/tree/master/src/qmoji), because I'm using it to field test the Fluid api & macos bindings. But I made this separate repositories so that releases will make sense. Also I'll probably move the source code over here eventually.
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+![screenshot](screenshot.png)
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+Inspired by the excellent [mojibar](https://github.com/muan/mojibar).
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+![sizes](sizes.png)
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+that's what I'm talkin bout
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+![memory](memory.png)
+
+definitely saving on the ram side of things too
+
+## Why make this?
+I'm making a [react-like UI framework for native reasonml](https://github.com/jaredly/fluid) & I wanted to try cloning a simple electron-based app as a proof of concept. [joakin suggested mojibar](https://twitter.com/joakin/status/1084898563082125312), and so here we are. It turned out to be more of a stress test than I was expecting (rendering 1500 views turned out to be prohibitively expensive, so I ended up exploring the wonderful world of `drawRect:` & custom NSViews), but I'm pretty happy with how it's turned out.
+
+## Future work
+that I'll probably do because I already like this better than mac's builtin picker
+
+- [ ] memory of most-frequently used
+- [ ] fuzzy search
+- [ ] option to start at login
+- [ ] skin tone modifier selection
+- [ ] more perf optimization for click / hover state (I currently invalidate the whole view when you click, which is hugely wasteful)
+- [ ] customize the global shortcut (maybe, idk)
+
+## Supported platforms
+
+This is macos only, and I don't really expect to port it to windows or linux -- the menubar stuff & the "send a keypress to the next active window" seems quite platform-specific. I am planning on making fluid cross-platform though (it currently supports js & native macos).