code cleanup, pod document, debug messages

Imported account related DNS subs from BotNow::DNS.pm Added use of carp instaed of die and better debug messages in places created bin/dnsTest.pl as a test/example script of using the functions in IRCNOW::Acct::DNS. Currently confirmed nextdns() works. Still need to work on pod documents and confirm the rest of the subs work. cliNow.pl was used as a base for dnsTest.pl and a copy of it made into ircTest.pl for the tests related to the IRC module.