Added scratchy tasks and config.js docs

docs/configuration/config.js.asciidoc

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+= Config.js =
+config.js is where you will find the core Kibana configuration. This file contains parameter that
+must be set before kibana is run for the first time.
+== Parameters ==
+
+=== elasticsearch ===
+
+The URL to your elasticsearch server. You almost certainly don't
+want 'http://localhost:9200' here. Even if Kibana and Elasticsearch are on
+the same host
+
+By default this will attempt to reach ES at the same host you have
+elasticsearch installed on. You probably want to set it to the FQDN of your
+elasticsearch host
+
+=== kibana-int ===
+
+The default ES index to use for storing Kibana specific object
+such as stored dashboards
+
+=== panel_name ===
+
+An array of panel modules available. Panels will only be loaded when they are defined in the
+dashboard, but this list is used in the "add panel" interface.