add README, metadata overlay.xml profiles

README.md

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+## What is this?
+An unofficial overlay obviously, to experiment with ebuilds.  
+
+To manually add overlay:
+```
+layman -f -a gentoo-overlay-trent -o https://raw.githubusercontent.com/TrentSPalmer/gentoo-overlay-trent/master/overlay.xml 
+```
+## Test drive?
+[Here's a Gist](https://gist.github.com/TrentSPalmer/a929dfdb0cdb7dd946d313bde708900e)
+with instructions for how to quickly spin up an nspawn container to do some test building,
+if you are into that sort of thing.
+
+## Portage Category
+the app-nvim category requires a configuration file
+
+```conf
+# /etc/portage/categories
+app-nvim
+```

metadata/layout.conf

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+masters = gentoo

overlay.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE repositories SYSTEM "/dtd/repositories.dtd">
+<repositories xmlns="" version="1.0">
+  <repo quality="experimental" status="unofficial">
+    <name>gentoo-overlay-trent</name>
+    <description>ebuild practice</description>
+    <homepage></homepage>
+    <owner>
+      <email></email>
+      <name>Trent Palmer</name>
+      <name>TrentSPalmer</name>
+    </owner>
+    <source type="git">https://github.com/TrentSPalmer/gentoo-overlay-trent.git</source>
+  </repo>
+</repositories>

profiles/repo_name

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+gentoo-overlay-trent