Add example pattern using kbn-info directive

Provide info based on verbage found in Logstash's elasticsearch output (http://logstash.net/docs/1.4.2/outputs/elasticsearch#index) documentation.
Provide clearer verbage
Show examples as help-block based on context

Based on @rashidkpc's feedback — display example / help text underneath the label as a help block allowing the user to more easily utilize the data inside of it.
Move "docs" link down and provide context

Moved docs link down to the help block and expanded link tag name to provide clearer information to the user about what it is documentation for.
Merge pull request #1591 from kkirsche/exampleIndexPattern-patch

[Fixes #1562] Add example index pattern to Settings > Indices