Adding some more detail to the csv output schema

[alexcpsec]

@technoskald anything else we may want to add? As soon as we are done, I will go forward with https://github.com/technoskald/measuring-iq-threat-feeds/issues/4 and https://github.com/technoskald/measuring-iq-threat-feeds/issues/5

[krmaxwell]

We don't need to specify type because IPv4 will always match \d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3} - unless you think we'll add other types later that might otherwise look like FQDNs.

[alexcpsec]

yeah, I am specifically thinking about other types. I'd like it to be "strongly typed", so we have more flexibility later on other stuff.