Implement hook_requirements() against a checklist to aid module configuration and installation

[MarcusBarnes]

Implement hook_requirements() against a checklist in the module configuration, to help aid administrators track which setup steps (outside of the module requirement steps) are needed in order for the Oral Histories Solution Pack to be minimally installed. For an example of how to do this, see: https://github.com/MarcusBarnes/status_report_demo.