moves stuff around so its not a disaster in the root

configs/zsh/ohmyzsh/plugins/powder/README.md

@@ -0,0 +1,8 @@
+# Powder
+
+This plugin provides completion for [powder](https://github.com/powder-rb/powder/).
+
+To use it, add powder to the plugins array of your zshrc file:
+```
+plugins=(... powder)
+```