Updated Slack Notify Plugin (markdown)

Slack-Notify-Plugin.md

@@ -11,13 +11,27 @@ This plugin joins a [Slack](https://www.slack.com/) room and sends a user-define
 | `message`   | No | The message to send to the room. Default - `<%PROJECT_URI%|%PROJECT_TITLE%> - <%BUILD_URI%|Build #%BUILD%> has finished for commit <%COMMIT_URI%|%SHORT_COMMIT% (%COMMIT_EMAIL%)> on branch <%BRANCH_URI%|%BRANCH%>` |
 | `show_status` | No | Whether or not to append the build status as an attachment in slack. Default - true
 
-Configuration example: 
-```yaml
-slack_notify:
-    webhook_url: "https://hooks.slack.com/services/R212T827A/G983UY31U/aIp0yuW9u0iTqwAMOEwTg"
-    room: "#phpci"
-    username: "PHPCI"
-    icon: ":ghost:"
-    message: "%PROJECT_TITLE% - build %BUILD% completed"
-    show_status: true
+Send a message if the build fails:
+```yams
+failure:
+    slack_notify:
+        webhook_url: "https://hooks.slack.com/services/R212T827A/G983UY31U/aIp0yuW9u0iTqwAMOEwTg"
+        room: "#phpci"
+        username: "PHPCI"
+        icon: ":ghost:"
+        message: "%PROJECT_TITLE% - build %BUILD% failed! :angry:"
+        show_status: false
+```
+
+Send a message every time the build is run:
+
+```yams
+failure:
+    slack_notify:
+        webhook_url: "https://hooks.slack.com/services/R212T827A/G983UY31U/aIp0yuW9u0iTqwAMOEwTg"
+        room: "#phpci"
+        username: "PHPCI"
+        icon: ":ghost:"
+        message: "%PROJECT_TITLE% - build %BUILD% completed :smiley:"
+        show_status: true
 ```