Tor all the things

[ghost]

this adds the tor and tor-port flags to all network bound sub commands and changes all api calls to respect tor if enabled

• config now has TorPort method to return flag value if set, or default
• api now only has newClient, this creates a tor client when flag is present. does not need to be exported anymore
• no methods take a tor argument as no longer needed
• all commands now share the same behaviour logging tor messages
• api.torClient was removed as not used anywhere
• all calls to api.newClient now check for and return the error
• api.HandlePost was removed as redundant of api.DoPost

[thebaer]

I added a few changes that make the messaging consistent and shows the user any errors. Otherwise this looks great! Thanks, Rob.