Agent process should be started automatically

LCF as it exists today is a bit too complex to run for an average user, especially with a separate agent process for crawling. LCF should be as easy to run as Solr is today. QuickStart is a good move in this direction, but the same user-visible simplicity is needed for full LCF. The separate agent process is a reasonable design for execution, but a little too cumbersome for the average user to manage.

Unfortunately, it is expected that starting up a multi-process application will require platform-specific scripting.

Note: This issue is part of Phase 1 of the CONNECTORS-50 umbrella issue.

KDW - this functionality is already present; however the documentation is not adequate to help people figure out how to do it. So I'm moving this to Documentation and treating it as a doc bug.