cli: Make sure user provided run options have a higher precedence over configs
cli: Configured command specific run options have a higher precedence over command defaults
cli: Allow hacking sessions to stick around for longer by inteligently handling docker run "--rm=false"
cli: Add info command
cli: Display total amount of associated containers when cleaning up
cli: Use DEVSTEP_SOURCE_IMAGE everywhere so that `devstep info` better reflects the reality