Add port redirection

[ivyleavedtoadflax]

Follows #21. Adds port redirect to the remote connect command.

To do this we probably need to do the following:

• Use case when instead of if else for handling commands
• Use case when for handling flags
• Handle options, e.g.: -r|--redirect localhost:8080:8080

[ivyleavedtoadflax]

Might be easier to implement #14 rather than do this in bash...

[nsorros]

Hey @ivyleavedtoadflax, could we get this into remote? What was the rational behind using case, do we need case for port redirection or we should split the case feature to another PR and implement port redirection first.

This is relevant for both prodigy and tensor board

[ivyleavedtoadflax]

not sure...i had problems stacking options and flags, perhaps that is why i went for case

[ivyleavedtoadflax]

Please save me and take this over @nsorros