Added doc for default files and cf_promises_validated.
Updated cf_promises_validated with new input.
Modified cf_promises_validated with more new input.
More refinement of cf_promises_validated.
Revert "More refinement of cf_promises_validated."

This reverts commit a5cc07aa8b587df6471ebf04d2784a1f6209b33d.
Revert "Revert "More refinement of cf_promises_validated.""

This reverts commit d15eb42e5591559112df68a8ee9e80017f9ee07c.
Moved some files to design center overview.
Moved policy server overview up one level.
Modified policy server meta data.
Removed statement about daemons and cf_promises_validated.
Updated cf_promises_validated based on review input.
Modified cf_promises_validated with markup and edits.
Added small note about workdir in cf_promises_validated.
Moved some files and updated meta data.
Merge pull request #371 from KevWright/default-files

Added doc for default files and cf_promises_validated.