Tidy up runit service scripts (#479)

* Fix the script installation path (install everything only on /etc/sv/ly)

* Update the runit scripts to get the TTY value from the /etc/ly/config.ini file

* Update readme.md

res/ly-runit-service/conf

@@ -8,7 +8,5 @@ fi
 BAUD_RATE=38400
 TERM_NAME=linux
 
-StandardInput=tty
-TTYPath=/dev/tty2
-TTYReset=yes
-TTYVHangup=yes
+auxtty=$(/bin/cat /etc/ly/config.ini 2>/dev/null 1| /bin/sed -n 's/\(^[[:space:]]*tty[[:space:]]*=[[:space:]]*\)\([[:digit:]][[:digit:]]*\)\(.*\)/\2/p')
+TTY=tty${auxtty:-2}