Storm

Add some basic webapp-manual storm->hipchat handling. I will add an input box for the Asana URL tomorrow so that the bot will post the storm gif along with the Asana link.
ok, that's neat.. but we should make this a feature of the bot, and expose an API for plugins to hook in.  If you merge my latest branch, you'll see that all plugins are not separate packages that hook into the bot's API. I'd like to keep that separation.

We could have a `RegisterStringList(category string, list []string)` and then `RandomString(category string)` .. Alternatively, we could make it a separate package, which each plugin uses or not.