Documentation on filters and name needs update

[hamiltont]

The docs for containers and images could use an entry for the filters parameter, which appears to be passed a dictionary that corresponds to the filters available via the docker command line

Also, the name parameter for images(...) could use some clarification that it is an exact search only e.g. if the image name+tag is foo/bar:12.04, then only the string foo/bar will return this container, and not any substrings e.g. foo, bar, or foo/bar:12.04