if user does not explicitly set Access Key ID and Secret Access Key t…

change all answers from NS1 to absolute for types that require it

boto3's methods as fallback

...for testing or emergencies

Lenient add record

Apply sub-zones before parents

0.9.1 version bump and changelog update

README.md: your -> you're typo

Include info about provider specific reqs in README

Revert the setup.cfg infra and go back to requirements.txt

I've continually run into problems with the setup.cfg route that I'm not
interested in investing the time to debug and fix. Looking around it doesn't
seem to be very common yet so I've had a hard time finding help/docs etc.

pycodestyle updates, mostly escaping \, couple r's, ignore break on binary

Skip unsupported records for NS1 & DNSimple

Mark SSHFP algorithm 4 as valid

Implements the unsupported records skipping fix [proposed by ross](https://github.com/github/octodns/issues/176#issuecomment-359294960) in #176 for DNSimple and additionally for NS1.

Fixes #176 and also the NS1 version of it (`AttributeError: 'Ns1Provider' object has no attribute '_data_for_DNSKEY'`) that currently affect domains that have DNSSEC enabled.

[RFC 7479](https://tools.ietf.org/html/rfc7479) introduces support for Ed25519 host keys for the SSHFP record.

Configurable geo healthcheck host & path

This will ensure unique refs for different zones. Without them the ref isn't
enough to make sure we're looking at the right thing (notably when we're
gc'ing old health checks.) This also adds a bit more debugging around health
checks.