Feature Request: persist command history across sessions

[griest024]

It would be useful for commands that I entered in a previous session to be available to future sessions. Its not a huge deal, but I often find myself retyping the same command to test a change that I made.

Edit: To clarify, I would want to iterate through previous commands with the UP arrow key, like in bash.

P.S. Excellent project, its been incredibly useful.