Add Optional Solr Cell/Tika Configuration

[deviantpixel]

This is more of a "would be nice" feature but it would be helpful if there were optional configuration for enabling Solr Cell/Tika for indexing the content of rich text binary documents (PDF, etc).

To consolidate existing documentation the following might be helpful:

• solrconfig.xml settings to enable Cell - https://www.drupal.org/node/1205190#comment-6517916
• Customizing Solr configuration in vagrant - http://forumone.github.io/web-starter/localdev/customization.html