New config

usage: freqtrade new-config [-h] [-c PATH]

options:
  -h, --help            show this help message and exit
  -c PATH, --config PATH
                        Specify configuration file (default:
                        `userdir/config.json` or `config.json` whichever
                        exists). Multiple --config options may be used. Can be
                        set to `-` to read config from stdin.