Fixed API compatibility (supposedly API has changed over time)

* response of the simple api is no longer just an array of kvk-numbers, now dealing with new response
* simplified find bedrijfsnaam query by changing several LIKE's to a single ILIKE
* find_by_kvk is now a special function, as KVK is now strictly a (BIG)INT. #find_by_kvk searches both the kvk and kvks columns
* closing all queries with ";", as required by the new API
* changed default limit from 1000 to 99, new API requirement
* sphinx service no longer available, now calld 'officieel'