updates json-builder to access file-path instead of url.
initial version of reindex-all one-off.
starts pid-list from bdr data.
Adds code to obtain a pid-list from the bdr collection-pid.
adds make-pids-to-remove, adds custom-solr-deletion code.
disables actual custom-index deletion (for testing)
Merge pull request #69 from birkin/master

implements initial custom-index cleanup.