Merge in ICO/coreos from feat/images-and-docs to master
* commit 'b93c75f8b8ea0ef49a7746d90d4a142bfae0c031':
doc: document all the current feature of CoreOS
feat(coros-image): add some basics image for coreos
Merge in ICO/coreos from feat/add-distro-setup to master
* commit '650d0f594941d17f74808a4387b48530283e175d':
feat(belden-coreos): add belden-coreos distro configuration
refactor(meta-belden-coreos): remove example recipes