include upgrade script in extra files for installation in /serval
rebuilt archives of extra files with upgrade script and python
and other goodies.
fixed missing $ in script.
added missing back-quote.
make IP addresses have only 4 octets instead of 5.
added missing end quote.
allow selection of router model for upgrading.
auto-detect router model and IP (if you are on my mac).
auto-detect IP address of router in some cases.
fixed two $1's that should be ${ip} now.
show remaining stuff in /overlay
update package fetching for wr703n