Index channel logs in elasticsearch

A very basic working version of indexing channel logs in elasticsearch. Let me know what changes are required in this pull request.

    sudo yum install elasticsearch
    sudo service elasticsearch start
    npm install elasticsearch

To test if elasticsearch is running, open: <a href="http://localhost:9200">http://localhost:9200</a>

To see all indexed documents

    curl -XGET 'localhost:9200/channel_logs/_search?pretty=true'