* govendor gopkg.in/yaml.v2
* Ignore YAML and BIND test data litter. Create README.txt files to force git to create subdirectories.
* Update convertzone to also read OctoDNS files
* add ns1 libs to vendor
* Create shim and wire into tests
* ns1 provider more working.
* vendor correct files
* comment diff functions
* ns1 docs
* making mx work with ns1
* ?
* refactor tests to make capability blocks easier. fix up ns1