paver: add README

plugins/paver/README.md

@@ -0,0 +1,12 @@
+# Paver
+
+This plugin adds completion for the `paver` command-line tool of [Paver](https://pythonhosted.org/Paver/).
+
+To use it, add `paver` to the plugins array of your zshrc file:
+```zsh
+plugins=(... paver)
+```
+
+The completion function creates a cache of paver tasks with the name `.paver_tasks`,
+in the current working directory. It regenerates that cache when the `pavement.py`
+changes.