After renaming to "tio" it makes sense to change the escape key
accordingly. Hence, the new escape key is ^t.
Meaning, in session, its now ctrl-t + q to quit.
Renamed to "tio" because it is shorter and this new name also more
precisely reflects what the program is - a simple TTY terminal I/O
application.
"tio" can be considered short for terminal I/O or TTY I/O or a
combination of the two, whichever you prefer.
Also, wanted to avoid naming conflicts with other projects.
