* 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
* ref(sources): refactor source registration and lookup to be lazy.
* fix(fake): don't make changes to passed in config values
* rework without init, tests are missing
* make client provider public
* fix all tests
* change parameter list order, minor improvements
* clientprovider -> clientgenerator, switch naming for interface/struct
