Allow using stdio as a 'Device'

[usbalbin]

A semi hacky POC for #85

(Yes, I have a low res screen :) )

[albin@macen serial-monitor-rust]$ ping 1.1.1.1 | cargo r

BTW, any ideas as to why the data does not show up until "number of plots" is increased to 2?

[hacknus]

Hi, first of all: thanks a lot for the contribution to this project! Using the serial monitor like this is probably attractive only for a small amount of people but nevertheless it is still a cool feature and would be cool to implement this! I'm currently busy with other stuff so I won't be able to contribute to this feature but I'm happy to check in from time to time.

Regarding this:

BTW, any ideas as to why the data does not show up until "number of plots" is increased to 2?

I'm aware of some bugs in the current release, specifically concerning the named lines in the plot and grouping etc. (see issue #80 ) This is going to be my next priority.