Update to 0.5.0 (hashicorp#253)

* Update to 0.5.0

* Add changelog for k8s service discovery

Update to 0.4.0 (hashicorp#211)

Update to v0.3.3 (hashicorp#178)

* Update to v0.3.3

* Reorder changelog

Update to 0.3.2 (hashicorp#166)

Update to 0.3.1 (hashicorp#162)

Update to 0.3.0 (hashicorp#154)

Update to 0.2.1 (hashicorp#111)

Update for 0.2.0 release (hashicorp#102)

Update changelog for 0.1.2 (hashicorp#34)

Add clusterrolebinding, fix service, update Vault (hashicorp#10)

* Add clusterrolebinding, fix service, update Vault

* Change authDelegator to false by default

* Clarify clusterIP comment