s/worker-/hoodie-plugin-<pluginname>/ on `hoodie install <pluginname>`

* * *

This commit was sponsored by The Hoodie Firm.
You can hire The Hoodie Firm:
http://go.hood.ie/thehoodiefirm

* * *

This commit was sponsored by The Hoodie Firm.
You can hire The Hoodie Firm:
http://go.hood.ie/thehoodiefirm
Merge pull request #32 from hoodiehq/plugins

s/worker-/hoodie-plugin-<pluginname>/ on `hoodie install <pluginname>`