finished a todo
escribe-hosts: add section for non '.escribe.com' hosts
escribe-hosts: add escribehost.com
escribe-hosts: added a main method
escribe-hosts: use sudo tee instead of running as root
escribe-hosts: add arg checking
escribe-hosts: ensure cannot run as root
escribe-hosts: check for .s before adding .escribe.com, remove now unnecessary non-'escribe.com's
escribe-hosts: preserve order of hosts
escribe-host: small cleanup
escribe-hosts: add a default user to ssh for each host
escribe-hosts: use a consistent marker
ssh: add config for default usernames