docs(tutorial): updated hubot tutorial

docs/sources/tutorials/hubot_howto.md

@@ -14,7 +14,10 @@ as it does in your browser.
 This guide will show you how to install and configure the [Hubot-Grafana](https://github.com/stephenyeargin/hubot-grafana)
 plugin. This plugin allows you to tell hubot to render any dashboard or graph right from a channel in
 Slack, Hipchat or Basecamp. The bot will respond with an image of the graph and a link that will
-take you the graph.
+take you to the graph.
+
+> *Amazon S3 Required*: The hubot-grafana script will upload the rendered graphs to Amazon S3. This
+> is so Hipchat and Slack can show them reliably (they require the image to be publicly available).
 
 <div class="text-center">
   <img src="/img/tutorials/hubot_grafana.png" class="center"></a>
@@ -72,12 +75,12 @@ You can add these from the API Keys page wich you find in the Organization dropd
 ### Amazon S3
 The `S3` options are optional but for the images to work properly in services like Slack and Hipchat they need
 to publicly available. By specifying the `S3` options the hubot-grafana script will publish the rendered
-panel to `S3` it will use that URL when it posts to Slack or Hipchat.
-
-For everything to work
+panel to `S3` and it will use that URL when it posts to Slack or Hipchat.
 
 ## Hubot commands
 
+- `hubot graf list`
+    - Lists the available dashboards
 - `hubot graf db graphite-carbon-metrics`
     - Graph all panels in the dashboard
 - `hubot graf db graphite-carbon-metrics:3`
@@ -92,12 +95,10 @@ For everything to work
     - Get only the third panel of a particular dashboard with a window of 8 days ago to yesterday
 - `hubot graf db graphite-carbon-metrics host=carbon-a`
     - Get a templated dashboard with the `$host` parameter set to `carbon-a`
-- `hubot graf list`
-    - Lists the available dashboards
 
 ## Aliases
-Some of the hubot commands above can lengthy and you might have to remember dashboard slug (url id).
-If you have a few favorite graphs you want to be able check up on often (lets say from your mobile) you
+Some of the hubot commands above can lengthy and you might have to remember the dashboard slug (url id).
+If you have a few favorite graphs you want to be able check up on often (let's say from your mobile) you
 can create hubot command aliases with the hubot script `hubot-alias`.
 
 Install it: