Create README.me

Just making a super simple README to get us started.

README.md

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+# VSCode Extension for the CUE Language
+
+## What it's for
+
+CUE - Configure, Unify, Execute - is a language designed for designing, 
+generating, and validating data. Read more about it on [the official site, cuelang.org](https://cuelang.org).
+
+## Why this extension is useful
+
+[Visual Studio Code](https://code.visualstudio.com/) is an awesome, extensible, multi-platform editor and IDE.
+Its ecosystem has a massive number of plugins for different languages, and this one implements syntax highlighting
+(and potentially more functionality in the future) for the CUE language.
+
+## How you can use it
+
+Unfortunately, the `.cue` extension which CUE uses is squatted on in the "official" VSCode registry by the file format used to describe audio CD tracklistings.
+So for the moment, manual installation is required. This is quite simple though. Once you have VSCode installed, simply clone this repo into its extension location:
+
+```shell
+    cd ~/.vscode/extensions
+    git clone [email protected]:betawaffle/vscode-cue.git
+```
+
+Restart VSCode and you should have syntax highlighting for any `.cue` files you load.