* Create `NewAWSProvider` with `AWSConfig` struct

Rather than calling `NewAWSProvider` with a list of objects, you will
now call it using a new `AWSConfig` struct. This allows for clearer
declarations of variables which becomes even  more important as more
variables are added.

* Add `aws-max-change-count` flag

Adding a new `aws-max-change-count` flag to override the default max
change count on the aws provider.

Included updated tests with a new `defaultMaxChangeCount` constant and
tests for setting the value as a flag and as an environment variable.

* Update CHANGELOG.md

Updating CHANGELOG.md with 'Add aws max change count flag' PR.

Bump version to v0.5.3

* Add recent changes to the changelog
* Update version in docs
Signed-off-by: Nick Jüttner <nick@zalando.de>

* Print a message if no hosted zones match (aws provider)

Fixes #590

* Remove early return

* First stab at NodePort support. Testing incomplete

* Fix up the unit tests

* Remove some deadcode in the unittests

* gather node ips once and add support for srv records

* Make sure we match gofmt simple

* Move the nodes to the testcase and add a test for clusters that only have internal ip addresses

* Somehow forgot about the weight field in the records

* Add SRV as a supported record type

'tcp' is not a supported value whereas 'TCP' is.

add cache to limit calls to providers

Signed-off-by: Jess Frazelle <acidburn@microsoft.com>

CoreDNS/SkyDNS provider

Add Azure MSI support

Make DNSimple tolerant of unknown zones

Add AWS Service Discovery provider

Like other providers, the DNSimple provider should ignore any records
that belong to zones outside of its control.

[Cloudflare] Custom record TTL

Signed-off-by: Nick Jüttner <nick@juni.io>

Signed-off-by: Nick Jüttner <nick@juni.io>

* Minor changes to docs and faq

* Other minor changes

* better docs

* Addressed comments

* Add new connector source

* Update docs for connector source

* use ticker

* stop the ticker