use /bin/sh -e in all scripts
simplified the readme a bit
reworded some messages in setup
reduced code duplication and made ssh-copy-id work with -e flag
improved the examples to test connection, using the active real settings
updated requirements
set AUTOSSH_PORT=0 in autossh.sh script itself, easier
added note how to stop all running sessions
added convenience script to show running autossh screen sessions
improved stop.sh
try to wipe session before stopping
handle case of dead sessions