Added the get_uuid method to return the UUID of the thermostat.
This allows a user to distinguish between one of multiple thermostats.
Add the find_all method to search the local network
Switch over to LWP::UserAgent so we can support perl 5.8
More changes to allow perl 5.8
Remove the encoding stanza to allow support of perl 5.8
Fix warnings and make find_all return undef in error case
Make find_all work -- add the http: prefix to the address