add docker
Added docstrings, examples, virtual method
docker: complete create_container
docker: complete export
pep8 pass
docker: doc
docker: first pass on run functions
docker: run functions - add script/script_retcode
docker: typo in ret_code
docker: rename internal functions
docker: rename internal functions pass2
docker: use unforked docker-py
docker: doc, more doc
docker: typo in doc