Implement regex parser for image names

[David Negstad]

Implement a regex for parsing image name components out of a full image name (registry, name, tag)

[Brandon Waterloo [MSFT]]

@danegsta and I were talking, and we thought it would be nice for the image list and/or inspect to include a lot of info about names. For example, something along these lines:

• Verbose full name, as verbose as possible. e.g. docker.io/library/alpine:latest
• "Original" full name, as close to the CLI output as possible. e.g. alpine:latest. For Docker this is probably just keeping off the implicit docker.io/library/
• Registry, e.g. docker.io
• Image e.g. library/alpine
• Maybe repository + separate image? e.g. library and alpine
• Tag e.g. latest