lib/deployment: create interfaces for Actioner and Backender
lib/deployment: fix godoc display issue with Backender.Info
deployment/types: Add Destroy(Actorer) to Backender
deployment/types: Update Actorer documentation to ref Actorer
deployment: introduce mock deployment backend
deployment/mock: add Actor and ActorInfo types
deployment/mock: add actor tests
deployment/types: simplify Backender.Deploy
deployment/mock: introduce Backend mock implementation
deployment/mock: add backend skeleton tests
Merge pull request #11 from Xe/lib/deployment

Create deployment interfaces, Introduce mock deployment backend