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.
```add_indicators_for_domain()``` is different than what ```create_indicator_from_domain()``` is meant to do. ```create_indicator_from_domain()``` will create an indicator of the given type and relate it to the Domain with the given id. It is used when looking at WHOIS service results and adding indicators (currently only email) from there just like you do in the data_miner service.

I would love to see all these "create indicator of type foo and relate it to object of type bar with id baz" functions consolidated into one, but I've decided to hold off on doing that.