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

Fixes Issue #1562 by providing information to the user using the kbn-info directive. Verbage used is based on Logstash's elasticsearch output (http://logstash.net/docs/1.4.2/outputs/elasticsearch#index) documentation.

Photo of change on desktop:
![screen shot 2014-10-08 at 2 36 25 pm](https://cloud.githubusercontent.com/assets/947110/4564761/0c76d1d4-4f1a-11e4-961c-8049720dab03.png)

Photo of change on mobile:
![screen shot 2014-10-08 at 2 36 32 pm](https://cloud.githubusercontent.com/assets/947110/4564768/1507a38c-4f1a-11e4-9ab7-128d3672697d.png)