WHOIS

Remove WHOIS support from core. WHOIS lookups are now done in a service.

Add support for creating indicators from a domain. This is intended to be used by AJAX calls on domain services that wish to create an indicator (ie: email fields in WHOIS records).

There is a corresponding PR for this in crits_services.
I've put a pseudo-migration script in place. Details are at:

https://github.com/crits/crits_services/commit/474870202c79323bf8470ad75d3d12de537c1699