Added a name value so make Kubernetes 1.8.5 work.

Had this error before:
```The Service "nginx" is invalid:
* spec.ports[0].name: Required value```

* chore: avoid shadowing package name

* fix: use constant format in call to Sprintf

* chore: try to make go1.9 work on travis

* updated logrus and all other packages

* re-glide and strip vendor in nested directories

* Added HostPort feature docs

* Fixed some typos

* Add note about CNAME and txt the registry

* Update README.md

* Added initial support for Headless services

* service.go: Fixed some formatting

* forgot to run gometalinter

* service: implemented alternative proposal, to reuse existing annotation

* source: some refactoring

Google Provider Add Ttl from annotations

Use `int64(ep.RecordTTL)` in `newRecord()`
Fallback to hardcoded 300s for backwards-compat
Add `TestNewRecords()`
Add notes in *ttl.md*

* How to use Azure DNS from non-Azure cluster

If the cluster is not Azure Container Service (or acs-engine) the configuration file for Azure DNS needs to be created manually.

* Azure.md, give explicit name to Service Principal

Fix for #368

* allow filtering by ingress class

* generic source annotation filter as opposed to ingress class filter

* rename and fix argument ordering, switch to label selector semantics

* remove redundant parameters

Fix minimum version of external-dns container to match that needed for InfoBlox DNS provider. (#383)

Rename OWNERS assignees: to approvers:

They are effectively the same, assignees is deprecated

* use the external-dns slack channel, add section how to become a maintainer for provider

* Update maintainer section

- Add `--inmemory-zone flag`
- Implement `InMemoryZoneInit` function to setup initial zones for
  inmemory provider
- Make "" the default zone for the inmemory provider instead of
  nil/none when no initial zones are specified
- Update config/flag parsing tests to accept new flag

* fix nil ptr dereference if zoneid does not match and we get empty string from im.filter.EndpointZoneID(ep, zones)

* add test that passes a not defined zone

* reuse the init struct to use it with expectedZonesState

* try to work around pointer check problem from assert.Equal, if this does not work we have to do a deep check

* use deep compare to test and not just check references

* remove test case that I added before and do not reflect the test needed to be done

* remove zone fiel that is not needed and use assert.Equal which is fine

* Cloudflare: Disable proxy mode for TXT and others

* Improve code according to review

* Add test

* Disable proxy mode for wildcards

* Fix review, add test

* Move var

* chore: fix some golang related stuff

* chore: update changelog to reflect latest changes

* Initial commit of Infoblox provider

* address @ideahitme's observations

* fail at addressing @szuecs comments

* fix(infoblox): avoid shadowing err variable

* fix flag descriptions

* default ssl verify to true. thanks @szuecs

* chore(infoblox): bump minium required version

This should ideally be a minor bump but let's do that when we have v0.5

* Add RecordTTL

* Route53: test for custom TTL

* Fix tests

* Fix remaining tests

* Add ttl when endpoint is created from ingress

* Missed a word

* Fix bad refactoring

* Add ingress custom TTL test

* gofmt

* Satisfy go-lint

* Unshadow `endpoint` in azure provider

* Fix and add an output test

* Add TTL for endpoints generated from service templates

* Take TTL into account when generating update plan

* Tests for TTL change impact on the plan

* Refactor factory method name

* Refactoring

* Run gofmt

* Make endpoint string format look like BIND config

* Update plan and plan_test

* Replace NewEndpointWithTTLValue with NewEndpointWithTTL in aws

* Remove NewEndpointWithTTLValue func

* Update references to TTL

* Remove getTTLValue func

* Handle merge conflict

* Update tests

* Update README, CHANGELOG and documentation

* Run gofmt

* Move getTTLFromAnnotations to a common file

* Refactor getTTLFromAnnotations

* Gofmt

* Add tests for getTTLFromAnnotations

* Trigger build

* Add boilerplate header

* Update README/CHANGELOG according to code review

* Add ttl.md and link it from README

* change CNAME string to endpoint.RecordTypeCNAME

* fix test cases with AWS ALIAS records, these do not behave different in these tests

* #228 Simplify DNS provider requirements by extracting common

* #228 Simplify DNS provider requirements by extracting common

* Missing boilerplate added

* rename recordtypefilter, fail fast statements

* rework zone finder, update deps

* chore: drop namespace from cloudflare method name

* Adds Dnsimple as a provider

* chore(vendor): remove vendor for smaller diff

* fix(config): make dnsimple selectable via flags

* Fix delete and update

* Dnsimple testify mock tests

* remove leaked file

* Move and simplify mock functions

* chore: use lowercase for logrus repository

* chore: update dependencies using glide

* chore: vendor dnsimple-go package

* ref: isolate suitable type in source package

* add support for DNSimple, thx @jose5918 :D

* chore: use lowercase for logrus repository

* chore: update dependencies using glide

* Add a new --cloudflare-proxied flag to toggle Cloudflare proxy feature

* Change flag description

* fix ingress

* add tests for detecting type for target annotation

* set RecordType at source

* add comments for linting

* ClusterIP service support

- First pass at addresssing #187 by allowing services with type ClusterIP to be directly supported

* Getting existing tests to pass

* Adjusting formatting for gofmt/govet

* Adding in guard logic around publishing of ClusterIP sources

* Addressing PR feedback

* Adding in CHANGELOG entry

* Adding in Headless service test