Mostly trivial fixes to get things up and running

* Check to see if options.auxes exists before iterating over it

* Added the auxcoin name to the auxes records so it is available in the
  below

* Fix error reporting in the getauxblock and aux gettransaction callbacks
  to reference what daemon.cmd actually passes to it

* Fix error reporting in the getauxblock and aux CheckBlockAccepted
  callbacks to look for the auxcoin name where it actually exists