Driver Model for commands

[mariotoffia]

Today, FluentDocker needs to have the docker binaries somewhere in the path or explicitly pointed out. A driver model that implements docker binaries and then later on allows for HTTP traffic only drivers to be loaded and used. This will enable communication with the docker daemon without using the binaries on the filesystem as a requirement.

Still the docker binary driver should be delivered with the main assembly so only one assembly is needed to provide exiting functionality. However if other drivers, it can be loaded and composed. A investigation how wide spread MEF on different system. That could be a candidate to use as weaver.