Feature request: add get newaddress command

[gotqn]

Currently, the only way to add new address is using the following command:

ppcoind getnewaddress

it will be nice to have the command as peerbox command.

[peercoinops]

Pull request already merged in. Looks like there hasn't been a release since Jan5

[peercoinops]

Since most of the commands can be run directly with ppcoind, is it necessary to duplicate the same commands in peerbox.py?