adding an id to the indexing, which is the location (url) of the doc, as determined by parsing the endpoint
configurable indexing interval, plus actual indexing of the doc in elastic search
fix to the indexer so it doesn't call the callback twice
doc update to contain INDEX_INTERVAL
added temporary refresh and delete methods to the search class till I move them somewhere more appropriate
working search by tag and _all on elastic search
removed unused code from indexer
removed api_key from the issuers table and created an api_key table. added contact email to the issuers table