* Add support for SRV records for NAMEDOTCOM and ROUTE53.
* Improve docs
* Rename RR() to ToRR().
* Rename RecordConfig Priority to MxPreference (affects json IR data)
* integration test started
* details
* More tests.
* idn tests and punycode (not tested fully because I'm on an aiplane)
* test for dual provider compatibility
* readme for tests
* vendor idna
* fix casing