REST API security docs improved
Upgrade to ES 1.4.1. Closes #194

- ES 1.3.0 -> 1.4.1
- Structured content tools 1.3.5 -> 1.3.6
- JIRA river 1.7.1 -> 1.8.0
- Remote rive 1.5.2 -> 1.6.0
Use custom build of Elasticsearch 1.4.1. Closes #195

- Note, custom rpm build of Elasticsearch 1.4.1 is not available now. It will be available once we need it.
Configurable custom queries. Closes #123