label watchdog:true in cluster-object-model (microsoft#1214)

add v0.6.1 release notes (microsoft#919)

* add v0.6.1 release notes

* apply review comments

* rename to release-notes

* Update release-notes.txt

release version 0.5.0

release version 0.4.1

release version 0.4.0

release version 0.3.0-alpha

release version 0.2.0-alpha

initial release