Add documentation for building a docker image (README.md)
Add documentation for building a docker image (README.md)

selvik/dockerclient,ibuildthecloud/dockerclient,crhym3/dockerclient,BlueDragonX/dockerclient,bajh/dockerclient,donhcd/dockerclient,dnephin/dockerclient,samalba/dockerclient,ehazlett/dockerclient,denverdino/dockerclient,yp-engineering/dockerclient,curoverse/dockerclient