improved docker image lookup to shut down correct server

filter to stop only this repo

pass docker command on restarting

clean up

connect to remote repl only when hostname and port is set (fixes #110)

added stuling for embeded console

Added support for web console in local repl (fixes #110)

Support clear screen in web console. Fix clearing screen starts new s…

…ession (fixes #66)

Fail on warnings when building. Starting to use keywords to extract f…

…rom responses

Support closing repl with Ctrl+D (closes #67)