fix(contrib): correct coloring

Notice that the circle in the middle of the logo is accidentally
colored blue in https://github.com/deis/deis/pull/926#issuecomment-42586532.
I shifted over the escape character one more character to the right
to fix that.
Merge pull request #938 from deis/fix-motd

fix(contrib): correct coloring
feat(controller): add Domain model

This is added in the API with 2 new URLS

GET /apps/{app}/domains to retrieve the list of the domains
POST /apps/{app}/domains/{domain} to create a new domain.

The CLI is adapted to make use of this new API.