improve terminal

[bpowers]

It is confusing that after you've started executing a command, you can't send additional input to the command's stdin. This causes things like

$ cat

To effectively hang the shell, even though they are behaving according to the specification. While we're at it, we should catch ctrl-c.

[bpowers]

Alternatives include tty.js and termlib.js. The downside to both is that they appear to not support scrollback

[bpowers]

nm -- tty.js supports scrollback

[nloveladyallen]

Also you shouldn't be able to edit previous commands and their output.